Podcast
Questions and Answers
Which type of cell-cell adhesion protein is responsible for the adhesion of white blood cells?
Which type of cell-cell adhesion protein is responsible for the adhesion of white blood cells?
What is the primary role of the glycocalyx or cell coat on the cell surface?
What is the primary role of the glycocalyx or cell coat on the cell surface?
Which type of specialized cell junction is responsible for allowing the unrestricted passage of small nutrient molecules between cells?
Which type of specialized cell junction is responsible for allowing the unrestricted passage of small nutrient molecules between cells?
What is the primary function of the resting membrane potential in nerve and muscle cells?
What is the primary function of the resting membrane potential in nerve and muscle cells?
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Which type of cell-cell adhesion protein is responsible for anchoring the cytoskeleton to the cell membrane?
Which type of cell-cell adhesion protein is responsible for anchoring the cytoskeleton to the cell membrane?
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What type of signal is required for releasing secretory materials outside the cell in regulative exocytosis?
What type of signal is required for releasing secretory materials outside the cell in regulative exocytosis?
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What type of endocytosis involves the transfer of large solid particles into the cell?
What type of endocytosis involves the transfer of large solid particles into the cell?
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What protein covers the area where the pit forms during clathrin-mediated endocytosis?
What protein covers the area where the pit forms during clathrin-mediated endocytosis?
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Which enzyme acts as a molecular scissor during clathrin-mediated endocytosis?
Which enzyme acts as a molecular scissor during clathrin-mediated endocytosis?
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What specific function does the adaptin protein perform in clathrin-mediated endocytosis?
What specific function does the adaptin protein perform in clathrin-mediated endocytosis?
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What is the main function of the phospholipid bilayer in a cell?
What is the main function of the phospholipid bilayer in a cell?
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Which component establishes and maintains the electrical charge difference across the plasma membrane?
Which component establishes and maintains the electrical charge difference across the plasma membrane?
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What is the role of glycocalyx in cell communication?
What is the role of glycocalyx in cell communication?
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How do intercellular connections contribute to cell physiology?
How do intercellular connections contribute to cell physiology?
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Which term refers to the collective carbohydrates molecules attached to the plasma membrane?
Which term refers to the collective carbohydrates molecules attached to the plasma membrane?
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What is the major lipid component of the plasma membrane according to the Fluid Mosaic Model?
What is the major lipid component of the plasma membrane according to the Fluid Mosaic Model?
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How does cholesterol contribute to regulating membrane fluidity during temperature changes?
How does cholesterol contribute to regulating membrane fluidity during temperature changes?
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Where do transmembrane proteins typically reside in the plasma membrane?
Where do transmembrane proteins typically reside in the plasma membrane?
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Which group of proteins completely spans the cell membrane according to the Fluid Mosaic Model?
Which group of proteins completely spans the cell membrane according to the Fluid Mosaic Model?
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In what way does cholesterol help in preventing phospholipid aggregation at low temperatures?
In what way does cholesterol help in preventing phospholipid aggregation at low temperatures?
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What is the main function of lipid rafts in the plasma membrane?
What is the main function of lipid rafts in the plasma membrane?
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Which type of proteins embedded in the plasma membrane allows the entry and exit of molecules?
Which type of proteins embedded in the plasma membrane allows the entry and exit of molecules?
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What is the role of integrins in cell physiology?
What is the role of integrins in cell physiology?
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Which type of proteins are essential for exocytosis by recognizing vesicles at docking sites?
Which type of proteins are essential for exocytosis by recognizing vesicles at docking sites?
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What is the primary function of CDC markers in intercellular communication?
What is the primary function of CDC markers in intercellular communication?
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What is the primary role of Inhibitory Postsynaptic Potential (IPSP) in the context of neuron communication?
What is the primary role of Inhibitory Postsynaptic Potential (IPSP) in the context of neuron communication?
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What is the specialized portion of the muscle cell membrane where the axon terminal innervates the muscle cell known as?
What is the specialized portion of the muscle cell membrane where the axon terminal innervates the muscle cell known as?
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What is the main outcome of Excitatory Postsynaptic Potential (EPSP) in a neuron?
What is the main outcome of Excitatory Postsynaptic Potential (EPSP) in a neuron?
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What structures typically innervate muscle cells at neuromuscular junctions?
What structures typically innervate muscle cells at neuromuscular junctions?
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Which type of potentials allow for the creation of graded potentials in postsynaptic neurons?
Which type of potentials allow for the creation of graded potentials in postsynaptic neurons?
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Which of the following statements accurately describes the role of glucagon in maintaining blood glucose homeostasis?
Which of the following statements accurately describes the role of glucagon in maintaining blood glucose homeostasis?
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Which of the following processes is primarily responsible for maintaining the resting membrane potential in nerve and muscle cells?
Which of the following processes is primarily responsible for maintaining the resting membrane potential in nerve and muscle cells?
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Which type of cell junction is responsible for facilitating the intercellular communication and passage of small molecules between adjacent cells?
Which type of cell junction is responsible for facilitating the intercellular communication and passage of small molecules between adjacent cells?
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What is the primary function of the glycocalyx, or cell coat, on the surface of cells?
What is the primary function of the glycocalyx, or cell coat, on the surface of cells?
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Which type of cell-cell adhesion protein is responsible for anchoring the cytoskeleton to the plasma membrane, providing mechanical strength and stability to cells?
Which type of cell-cell adhesion protein is responsible for anchoring the cytoskeleton to the plasma membrane, providing mechanical strength and stability to cells?
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Which of the following statements accurately describes the concept of enantiostasis in the context of physiological processes?
Which of the following statements accurately describes the concept of enantiostasis in the context of physiological processes?
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Which of the following statements accurately describes the role of hemocyanin in the blue crab's (Callinectes sapidus) ability to live in both high and low salinity environments?
Which of the following statements accurately describes the role of hemocyanin in the blue crab's (Callinectes sapidus) ability to live in both high and low salinity environments?
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Which of the following transport mechanisms is primarily responsible for the movement of large molecules, such as proteins, across the plasma membrane?
Which of the following transport mechanisms is primarily responsible for the movement of large molecules, such as proteins, across the plasma membrane?
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Which of the following statements accurately describes the role of pathophysiology in the context of disease and wellness?
Which of the following statements accurately describes the role of pathophysiology in the context of disease and wellness?
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Which of the following statements accurately describes the relationship between input and output in maintaining wellness or homeostasis?
Which of the following statements accurately describes the relationship between input and output in maintaining wellness or homeostasis?
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In the propagation of action potential, the influx of Na+ ions in the active area triggers depolarization.
In the propagation of action potential, the influx of Na+ ions in the active area triggers depolarization.
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The refractory period ensures that another action potential can be initiated at any point along the axon.
The refractory period ensures that another action potential can be initiated at any point along the axon.
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Schwann cells are the myelin-forming cells found in the Central Nervous System (CNS).
Schwann cells are the myelin-forming cells found in the Central Nervous System (CNS).
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The action potential is initially produced at the axon hillock.
The action potential is initially produced at the axon hillock.
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During the relative refractory period, a stronger stimulus is needed to produce another action potential due to hyperpolarization.
During the relative refractory period, a stronger stimulus is needed to produce another action potential due to hyperpolarization.
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Excitatory Postsynaptic Potential (EPSP) causes hyperpolarization of the postsynaptic neuron.
Excitatory Postsynaptic Potential (EPSP) causes hyperpolarization of the postsynaptic neuron.
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The axon hillock is the site where action potentials are initiated in a neuron.
The axon hillock is the site where action potentials are initiated in a neuron.
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Myelin-forming cells, like oligodendrocytes in the central nervous system, wrap around axons to increase the speed of action potential propagation.
Myelin-forming cells, like oligodendrocytes in the central nervous system, wrap around axons to increase the speed of action potential propagation.
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During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the stimulus strength.
During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the stimulus strength.
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Schwann cells are myelin-forming cells found in the central nervous system.
Schwann cells are myelin-forming cells found in the central nervous system.
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During the peak of the action potential, the Na+ inactivation gate opens, allowing Na+ to enter the cell.
During the peak of the action potential, the Na+ inactivation gate opens, allowing Na+ to enter the cell.
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K+ leaves the cell during the repolarization phase, causing it to return to its resting potential.
K+ leaves the cell during the repolarization phase, causing it to return to its resting potential.
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The action potential falling phase is primarily initiated by the closure of the K+ activation gate.
The action potential falling phase is primarily initiated by the closure of the K+ activation gate.
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The Na+ activation gate opens during the action potential falling phase.
The Na+ activation gate opens during the action potential falling phase.
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Myelin-forming cells play a crucial role in increasing the speed of action potential propagation by promoting saltatory conduction.
Myelin-forming cells play a crucial role in increasing the speed of action potential propagation by promoting saltatory conduction.
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Saltatory conduction occurs when the impulse travels smoothly along the axon without interruptions.
Saltatory conduction occurs when the impulse travels smoothly along the axon without interruptions.
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In saltatory conduction, the action potential leaps over myelinated sections, slowing down the propagation of action potentials.
In saltatory conduction, the action potential leaps over myelinated sections, slowing down the propagation of action potentials.
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Myelination decreases the speed of conduction of action potentials and consumes more energy in the process.
Myelination decreases the speed of conduction of action potentials and consumes more energy in the process.
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The nodes of Ranvier contain a rich number of voltage-gated K+ channels.
The nodes of Ranvier contain a rich number of voltage-gated K+ channels.
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Oligodendrocytes and Schwann cells are responsible for forming the myelin sheath around axons in the nervous system.
Oligodendrocytes and Schwann cells are responsible for forming the myelin sheath around axons in the nervous system.
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The axon hillock is the initial segment of the axon where action potentials are generated.
The axon hillock is the initial segment of the axon where action potentials are generated.
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During action potential propagation, the membrane potential returns to its resting state through the influx of potassium ions.
During action potential propagation, the membrane potential returns to its resting state through the influx of potassium ions.
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The absolute refractory period occurs when the voltage-gated sodium channels are recovering from inactivation and cannot be reopened.
The absolute refractory period occurs when the voltage-gated sodium channels are recovering from inactivation and cannot be reopened.
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Oligodendrocytes are myelin-forming cells found in the peripheral nervous system.
Oligodendrocytes are myelin-forming cells found in the peripheral nervous system.
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Nodes of Ranvier are the gaps between adjacent Schwann cells or oligodendrocytes where action potentials are regenerated.
Nodes of Ranvier are the gaps between adjacent Schwann cells or oligodendrocytes where action potentials are regenerated.
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During the relative refractory period, a weaker stimulus is needed to produce another action potential due to depolarization.
During the relative refractory period, a weaker stimulus is needed to produce another action potential due to depolarization.
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Schwann cells are the myelin-forming cells found in the Central Nervous System (CNS).
Schwann cells are the myelin-forming cells found in the Central Nervous System (CNS).
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The action potential is initially produced at the dendrites.
The action potential is initially produced at the dendrites.
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The absolute refractory period is a time when another action potential can be triggered, regardless of the stimulus strength.
The absolute refractory period is a time when another action potential can be triggered, regardless of the stimulus strength.
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Myelin sheaths increase the speed of action potential propagation by decreasing membrane resistance.
Myelin sheaths increase the speed of action potential propagation by decreasing membrane resistance.
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The action potential is initiated at the axon hillock.
The action potential is initiated at the axon hillock.
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During the absolute refractory period, a second action potential can be initiated regardless of the stimulus strength.
During the absolute refractory period, a second action potential can be initiated regardless of the stimulus strength.
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Schwann cells are the myelin-forming cells found in the Central Nervous System (CNS).
Schwann cells are the myelin-forming cells found in the Central Nervous System (CNS).
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The relative refractory period is characterized by hyperpolarization of the cell membrane.
The relative refractory period is characterized by hyperpolarization of the cell membrane.
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Myelin sheath is a continuous covering along the entire length of an axon, with no interruptions.
Myelin sheath is a continuous covering along the entire length of an axon, with no interruptions.
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Conduction velocity is slower in myelinated axons compared to unmyelinated axons.
Conduction velocity is slower in myelinated axons compared to unmyelinated axons.
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The myelin sheath is formed by a fatty substance called cerebrospinal fluid.
The myelin sheath is formed by a fatty substance called cerebrospinal fluid.
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Nodes of Ranvier are regions of the axon covered by myelin sheath.
Nodes of Ranvier are regions of the axon covered by myelin sheath.
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Saltatory conduction allows an action potential to travel continuously along an axon.
Saltatory conduction allows an action potential to travel continuously along an axon.
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The absolute refractory period is shorter than the relative refractory period.
The absolute refractory period is shorter than the relative refractory period.
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Saltatory conduction is a type of nerve impulse propagation where the impulse 'jumps' from node to node, skipping over the myelinated sections of the axon, thus increasing conduction ________
Saltatory conduction is a type of nerve impulse propagation where the impulse 'jumps' from node to node, skipping over the myelinated sections of the axon, thus increasing conduction ________
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The axon hillock is the site where action potentials are initiated in a neuron, serving as the trigger zone for generating an ________ potential
The axon hillock is the site where action potentials are initiated in a neuron, serving as the trigger zone for generating an ________ potential
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During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the ________ strength
During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the ________ strength
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Non-specific ion channels in the subsynaptic membrane permit simultaneous passage of Na+ and K+ ions, causing a change in membrane ________
Non-specific ion channels in the subsynaptic membrane permit simultaneous passage of Na+ and K+ ions, causing a change in membrane ________
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Schwann cells are the primary myelin-forming cells found in the peripheral nervous system, while oligodendrocytes fulfill this role in the ________ nervous system
Schwann cells are the primary myelin-forming cells found in the peripheral nervous system, while oligodendrocytes fulfill this role in the ________ nervous system
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The spread of action potential occurs along every patch of the membrane down the length of the ______
The spread of action potential occurs along every patch of the membrane down the length of the ______
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Action potential is produced at the ______, the initial active area where AP is produced
Action potential is produced at the ______, the initial active area where AP is produced
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Voltage-gated Na+ channels will never open unless action potential is done, ensuring the one-way propagation of action potential through ______
Voltage-gated Na+ channels will never open unless action potential is done, ensuring the one-way propagation of action potential through ______
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Schwann cells in PNS and Oligodendrocytes in CNS are two important ______-forming cells
Schwann cells in PNS and Oligodendrocytes in CNS are two important ______-forming cells
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After the Absolute Refractory Period, the portion of the membrane can be stimulated to produce an action potential; however, it needs a stronger stimulus during the ______ Refractory Period
After the Absolute Refractory Period, the portion of the membrane can be stimulated to produce an action potential; however, it needs a stronger stimulus during the ______ Refractory Period
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During action potential propagation, the membrane potential returns to its resting state through the efflux of _______ ions.
During action potential propagation, the membrane potential returns to its resting state through the efflux of _______ ions.
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After the Absolute Refractory Period, the portion of the membrane can be stimulated to produce an action potential; however, it needs a stronger stimulus during the _______ Refractory Period.
After the Absolute Refractory Period, the portion of the membrane can be stimulated to produce an action potential; however, it needs a stronger stimulus during the _______ Refractory Period.
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Action potential is produced at the ______, the initial active area where AP is produced.
Action potential is produced at the ______, the initial active area where AP is produced.
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Myelin sheaths increase the speed of action potential propagation by decreasing ______ resistance.
Myelin sheaths increase the speed of action potential propagation by decreasing ______ resistance.
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Schwann cells are myelin-forming cells found in the ______ Nervous System (CNS).
Schwann cells are myelin-forming cells found in the ______ Nervous System (CNS).
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During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the stimulus strength. This period ensures that the neuron has time to recover before firing another action potential. The absolute refractory period is essential for maintaining the ______ of action potential propagation.
During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the stimulus strength. This period ensures that the neuron has time to recover before firing another action potential. The absolute refractory period is essential for maintaining the ______ of action potential propagation.
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The ______ is the site in a neuron where action potentials are initiated. It acts as a trigger zone due to its high density of voltage-gated ion channels.
The ______ is the site in a neuron where action potentials are initiated. It acts as a trigger zone due to its high density of voltage-gated ion channels.
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Saltatory conduction, which occurs in myelinated axons, allows the action potential to 'jump' between the nodes of Ranvier. This process significantly speeds up the propagation of action potentials compared to continuous conduction in unmyelinated axons. Myelin-forming cells, such as Schwann cells in the peripheral nervous system, play a crucial role in promoting ______ conduction.
Saltatory conduction, which occurs in myelinated axons, allows the action potential to 'jump' between the nodes of Ranvier. This process significantly speeds up the propagation of action potentials compared to continuous conduction in unmyelinated axons. Myelin-forming cells, such as Schwann cells in the peripheral nervous system, play a crucial role in promoting ______ conduction.
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The relative refractory period follows the absolute refractory period and is characterized by hyperpolarization of the cell membrane. During this period, a stronger stimulus is needed to generate another action potential due to the increased threshold caused by the hyperpolarization. This phenomenon contributes to the ______ of action potential propagation.
The relative refractory period follows the absolute refractory period and is characterized by hyperpolarization of the cell membrane. During this period, a stronger stimulus is needed to generate another action potential due to the increased threshold caused by the hyperpolarization. This phenomenon contributes to the ______ of action potential propagation.
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Inhibitory Postsynaptic Potentials (IPSPs) and Excitatory Postsynaptic Potentials (EPSPs) are crucial in modulating neuronal activity. IPSPs lead to hyperpolarization of the postsynaptic neuron, making it less likely to generate an action potential, while EPSPs induce depolarization, increasing the chances of an action potential. This modulation of membrane potential and ______ is essential for proper neuronal function.
Inhibitory Postsynaptic Potentials (IPSPs) and Excitatory Postsynaptic Potentials (EPSPs) are crucial in modulating neuronal activity. IPSPs lead to hyperpolarization of the postsynaptic neuron, making it less likely to generate an action potential, while EPSPs induce depolarization, increasing the chances of an action potential. This modulation of membrane potential and ______ is essential for proper neuronal function.
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The direction of flow of current is established by the flow of positive ions. Excitable cells such as neurons and muscles evolved for rapid signaling, coordination, and movement. Allow changes in membrane electrical state. Every cell has a certain membrane potential that is important for rapid signaling, coordination, and movement. Communication is an important part of homeostasis. Communication is critical for the survival of the cells that compose the body. Polarization— the value of the membrane potential is not 0 mV. May either be positive or negative longer the duration of the graded potential. Local changes in membrane potential that occur in varying grades or degrees of magnitude or strength. When the area of the cell membrane is triggered by a stimulus, a graded potential may happen; decrease decrementally. Initial active area → graded potential travels(example: 14 mV) → *example: 7 mV on both sides. OUTLINE Introduction IV. Synapses and Integration A. Overview A. Subtopic 1 Graded Potentials V. Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal. DIFFERENT MEMBRANE ELECTRICAL STATES 1.
The direction of flow of current is established by the flow of positive ions. Excitable cells such as neurons and muscles evolved for rapid signaling, coordination, and movement. Allow changes in membrane electrical state. Every cell has a certain membrane potential that is important for rapid signaling, coordination, and movement. Communication is an important part of homeostasis. Communication is critical for the survival of the cells that compose the body. Polarization— the value of the membrane potential is not 0 mV. May either be positive or negative longer the duration of the graded potential. Local changes in membrane potential that occur in varying grades or degrees of magnitude or strength. When the area of the cell membrane is triggered by a stimulus, a graded potential may happen; decrease decrementally. Initial active area → graded potential travels(example: 14 mV) → *example: 7 mV on both sides. OUTLINE Introduction IV. Synapses and Integration A. Overview A. Subtopic 1 Graded Potentials V. Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal. DIFFERENT MEMBRANE ELECTRICAL STATES 1.
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Synapses and Integration A. Overview A. Subtopic 1 Graded Potentials V. Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal. DIFFERENT MEMBRANE ELECTRICAL STATES 1.
Synapses and Integration A. Overview A. Subtopic 1 Graded Potentials V. Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal. DIFFERENT MEMBRANE ELECTRICAL STATES 1.
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The direction of flow of current is established by the flow of positive ions. Excitable cells such as neurons and muscles evolved for rapid signaling, coordination, and movement. Allow changes in membrane electrical state. Every cell has a certain membrane potential that is important for rapid signaling, coordination and movement. Communication is an important part of homeostasis. Communication is critical for the survival of the cells that compose the body. Polarization— the value of the membrane potential is not 0 mV. May either be positive or negative longer the duration of the graded potential. Local changes in membrane potential that occur in varying grades or degrees of magnitude or strength. When the area of the cell membrane is triggered by a stimulus, a graded potential may happen; decrease decrementally. Initial active area → graded potential travels(example: 14 mV) → *example: 7 mV on both sides. OUTLINE Introduction IV. Synapses and Integration A. Overview A. Subtopic 1 Graded Potentials V. Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal.
The direction of flow of current is established by the flow of positive ions. Excitable cells such as neurons and muscles evolved for rapid signaling, coordination, and movement. Allow changes in membrane electrical state. Every cell has a certain membrane potential that is important for rapid signaling, coordination and movement. Communication is an important part of homeostasis. Communication is critical for the survival of the cells that compose the body. Polarization— the value of the membrane potential is not 0 mV. May either be positive or negative longer the duration of the graded potential. Local changes in membrane potential that occur in varying grades or degrees of magnitude or strength. When the area of the cell membrane is triggered by a stimulus, a graded potential may happen; decrease decrementally. Initial active area → graded potential travels(example: 14 mV) → *example: 7 mV on both sides. OUTLINE Introduction IV. Synapses and Integration A. Overview A. Subtopic 1 Graded Potentials V. Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal.
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Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal. DIFFERENT MEMBRANE ELECTRICAL STATES 1.
Neural Signaling and A. Graded Potential External Agents Action Potential A. Subtopic 1 A. Introduction B. Axon Hillock C. Action Potential Propagation D. Axon terminal. DIFFERENT MEMBRANE ELECTRICAL STATES 1.
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Neural Signaling and Graded Potential External Agents Action Potential A. Subtopic 1 Introduction Axon Hillock Action Potential Propagation Axon terminal DIFFERENT MEMBRANE ELECTRICAL STATES 1.
Neural Signaling and Graded Potential External Agents Action Potential A. Subtopic 1 Introduction Axon Hillock Action Potential Propagation Axon terminal DIFFERENT MEMBRANE ELECTRICAL STATES 1.
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Connective tissue is composed primarily of an extracellular matrix and a limited number of ______.
Connective tissue is composed primarily of an extracellular matrix and a limited number of ______.
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Adipose or fat tissues store ______ in the form of adipose tissues.
Adipose or fat tissues store ______ in the form of adipose tissues.
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The action potential falling phase is primarily initiated by the closure of the K+ activation ______.
The action potential falling phase is primarily initiated by the closure of the K+ activation ______.
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Saltatory conduction is a type of nerve impulse propagation where the impulse 'jumps' from node to node, skipping over the ______ sections of the axon, thus increasing conduction speed.
Saltatory conduction is a type of nerve impulse propagation where the impulse 'jumps' from node to node, skipping over the ______ sections of the axon, thus increasing conduction speed.
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Schwann cells are the ______ cells found in the Central Nervous System (CNS).
Schwann cells are the ______ cells found in the Central Nervous System (CNS).
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The axon hillock is the site where action potentials are initiated in a ______.
The axon hillock is the site where action potentials are initiated in a ______.
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During the relative refractory period, a stronger stimulus is needed to produce another action potential due to ______.
During the relative refractory period, a stronger stimulus is needed to produce another action potential due to ______.
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Myelin sheaths increase the speed of action potential propagation by decreasing membrane ______.
Myelin sheaths increase the speed of action potential propagation by decreasing membrane ______.
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During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the stimulus ______.
During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the stimulus ______.
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K+ leaves the cell during the repolarization phase, causing it to return to its resting ______.
K+ leaves the cell during the repolarization phase, causing it to return to its resting ______.
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During the peak of the action potential, the Na+ inactivation gate closes and PNa+ falls, ending the net movement of Na+ into the cell. At the same time, the K+ activation gate opens and PK+ rises. K+ leaves the cell, causing its repolarization to resting potential, which generates a falling phase of action potential. On return to resting potential, the Na+ activation gate closes and inactivation gate opens, resetting the channel to respond to another depolarizing triggering event. Further outward movement of K+ through a still-open K+ channel briefly hyperpolarizes the membrane, which generates after hyperpolarization. K+ activation gate closes, and the membrane returns to resting potential. This sequence of events describes the process of ________ potential propagation.
During the peak of the action potential, the Na+ inactivation gate closes and PNa+ falls, ending the net movement of Na+ into the cell. At the same time, the K+ activation gate opens and PK+ rises. K+ leaves the cell, causing its repolarization to resting potential, which generates a falling phase of action potential. On return to resting potential, the Na+ activation gate closes and inactivation gate opens, resetting the channel to respond to another depolarizing triggering event. Further outward movement of K+ through a still-open K+ channel briefly hyperpolarizes the membrane, which generates after hyperpolarization. K+ activation gate closes, and the membrane returns to resting potential. This sequence of events describes the process of ________ potential propagation.
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The site where action potentials are triggered by a graded potential if it is of sufficient magnitude is known as the neuron’s ________ zone.
The site where action potentials are triggered by a graded potential if it is of sufficient magnitude is known as the neuron’s ________ zone.
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The ________ is the initial segment of the axon where action potentials are generated.
The ________ is the initial segment of the axon where action potentials are generated.
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During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the ________ strength.
During the absolute refractory period, it is impossible for an action potential to be initiated, regardless of the ________ strength.
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Myelin-forming cells, like oligodendrocytes in the central nervous system, wrap around axons to increase the speed of ________ propagation.
Myelin-forming cells, like oligodendrocytes in the central nervous system, wrap around axons to increase the speed of ________ propagation.
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