Podcast
Questions and Answers
What is the function of the pericardium?
What is the function of the pericardium?
- To cover the heart (correct)
- To cover the lungs
- To cover the liver
- To cover the kidneys
What is the function of the peritoneum?
What is the function of the peritoneum?
- To cover the abdominal organs (correct)
- To cover the liver
- To cover the heart
- To cover the lungs
What is homeostasis?
What is homeostasis?
- A relatively constant internal environment (correct)
- A constantly changing external environment
- A relatively constant external environment
- A constantly changing internal environment
Which of the following is an example of a condition that is maintained within a relatively narrow range of normal values in the body?
Which of the following is an example of a condition that is maintained within a relatively narrow range of normal values in the body?
What are the two components of epithelial tissue?
What are the two components of epithelial tissue?
What is the correct name for the layer of the skin that contains glands, hair follicles, receptors, and blood vessels?
What is the correct name for the layer of the skin that contains glands, hair follicles, receptors, and blood vessels?
What are the three layers of the skin?
What are the three layers of the skin?
What surrounds body cells and allows for the exchange of substances?
What surrounds body cells and allows for the exchange of substances?
Which organ system produces hormones and coordinates organ systems?
Which organ system produces hormones and coordinates organ systems?
Which organ system exchanges gases at both lungs?
Which organ system exchanges gases at both lungs?
Which organ system ingests and processes food?
Which organ system ingests and processes food?
Which organ system provides support and protection, and assists in movement?
Which organ system provides support and protection, and assists in movement?
What is the function of the peritoneum?
What is the function of the peritoneum?
What is the correct definition of homeostasis?
What is the correct definition of homeostasis?
Which layers make up the skin?
Which layers make up the skin?
What is the function of the control center in a negative feedback loop?
What is the function of the control center in a negative feedback loop?
Which component of a negative feedback loop carries out the response?
Which component of a negative feedback loop carries out the response?
What is the role of the receptor in a negative feedback loop?
What is the role of the receptor in a negative feedback loop?
What is a positive feedback loop?
What is a positive feedback loop?
Which of the following is an example of a negative feedback loop?
Which of the following is an example of a negative feedback loop?
What happens in a positive feedback loop?
What happens in a positive feedback loop?
Which of the following is an example of a positive feedback loop?
Which of the following is an example of a positive feedback loop?
What is the difference between positive and negative feedback loops?
What is the difference between positive and negative feedback loops?
What are the two types of cells that make up nervous tissue?
What are the two types of cells that make up nervous tissue?
Which type of cells is the most numerous in the nervous system?
Which type of cells is the most numerous in the nervous system?
What is the charge of the plasma membrane of a resting neuron's axon?
What is the charge of the plasma membrane of a resting neuron's axon?
What happens first during an action potential?
What happens first during an action potential?
What is the correct order of events when a neuron is stimulated?
What is the correct order of events when a neuron is stimulated?
What is the function of neuroglia cells in the nervous system?
What is the function of neuroglia cells in the nervous system?
What is the role of fibroblasts in nervous tissue?
What is the role of fibroblasts in nervous tissue?
What is the function of adipose cells in nervous tissue?
What is the function of adipose cells in nervous tissue?
What is the function of neurotransmitters in the nervous system?
What is the function of neurotransmitters in the nervous system?
What is the charge of the inside of a neuron's axon during an action potential?
What is the charge of the inside of a neuron's axon during an action potential?
What is the charge of the outside of a neuron's axon during an action potential?
What is the charge of the outside of a neuron's axon during an action potential?
What happens to potassium ions during an action potential?
What happens to potassium ions during an action potential?
What is the role of the Sodium-Potassium Pump in a neuron?
What is the role of the Sodium-Potassium Pump in a neuron?
During repolarization, what moves from inside the axon to outside the axon through potassium gated channels?
During repolarization, what moves from inside the axon to outside the axon through potassium gated channels?
What is the result of potassium ions moving from inside the axon to outside the axon during repolarization?
What is the result of potassium ions moving from inside the axon to outside the axon during repolarization?
What is the Answer in the context of a neuron?
What is the Answer in the context of a neuron?
What is the concentration of sodium ions like in a resting neuron?
What is the concentration of sodium ions like in a resting neuron?
What is the function of myelin in an axon?
What is the function of myelin in an axon?
What is the role of calcium ions in a neuron?
What is the role of calcium ions in a neuron?
What is the function of dendrites in a neuron?
What is the function of dendrites in a neuron?
What is the function of axons in a neuron?
What is the function of axons in a neuron?
What is the role of the refractory period in a neuron?
What is the role of the refractory period in a neuron?
What is the function of neurotransmitters in a neuron?
What is the function of neurotransmitters in a neuron?
What is the function of synapses in a neuron?
What is the function of synapses in a neuron?
What is the function of the Sodium-Potassium Pump in a neuron?
What is the function of the Sodium-Potassium Pump in a neuron?
During repolarization, which ions move from inside the axon to outside the axon through potassium channels?
During repolarization, which ions move from inside the axon to outside the axon through potassium channels?
What is the charge of the inside of the plasma membrane of an axon during repolarization?
What is the charge of the inside of the plasma membrane of an axon during repolarization?
What is the period immediately after an action potential when the axon is unable to conduct another action potential called?
What is the period immediately after an action potential when the axon is unable to conduct another action potential called?
What is the role of myelin in a neuron?
What is the role of myelin in a neuron?
What is the charge of the inside of the plasma membrane of a neuron during resting potential?
What is the charge of the inside of the plasma membrane of a neuron during resting potential?
What is the ion responsible for depolarization during an action potential?
What is the ion responsible for depolarization during an action potential?
What is the ion responsible for repolarization during an action potential?
What is the ion responsible for repolarization during an action potential?
What is the charge of the outside of the plasma membrane of a neuron during resting potential?
What is the charge of the outside of the plasma membrane of a neuron during resting potential?
What is the charge of the outside of the plasma membrane of a neuron during repolarization?
What is the charge of the outside of the plasma membrane of a neuron during repolarization?
What is the ion responsible for hyperpolarization during an action potential?
What is the ion responsible for hyperpolarization during an action potential?
What is the concentration gradient of sodium ions during resting potential?
What is the concentration gradient of sodium ions during resting potential?
What is the name of the protein in the plasma membrane of a neuron that actively transports sodium and potassium ions across the membrane against their concentration gradients?
What is the name of the protein in the plasma membrane of a neuron that actively transports sodium and potassium ions across the membrane against their concentration gradients?
During repolarization, which ion moves from inside the axon to outside the axon through potassium gated channels?
During repolarization, which ion moves from inside the axon to outside the axon through potassium gated channels?
What is the charge of the inside of the plasma membrane of the axon during repolarization compared to the outside?
What is the charge of the inside of the plasma membrane of the axon during repolarization compared to the outside?
What is the term for the time immediately after an action potential when the axon is unable to conduct another action potential?
What is the term for the time immediately after an action potential when the axon is unable to conduct another action potential?
Which ion has a greater concentration inside the axon of a resting neuron?
Which ion has a greater concentration inside the axon of a resting neuron?
What is the role/function of myelin in the nervous system?
What is the role/function of myelin in the nervous system?
What is the term for the process of potassium ions leaving the axon during repolarization?
What is the term for the process of potassium ions leaving the axon during repolarization?
What is the term for the process of neurotransmitters crossing the synaptic cleft and binding to receptors on the postsynaptic neuron?
What is the term for the process of neurotransmitters crossing the synaptic cleft and binding to receptors on the postsynaptic neuron?
Which ion has a greater concentration outside the axon of a resting neuron?
Which ion has a greater concentration outside the axon of a resting neuron?
What is the term for the process of neurotransmitters being taken back up into the presynaptic neuron?
What is the term for the process of neurotransmitters being taken back up into the presynaptic neuron?
Which ion is responsible for depolarization of the neuron during an action potential?
Which ion is responsible for depolarization of the neuron during an action potential?
What is the term for the minimum level of stimulation required to trigger an action potential in a neuron?
What is the term for the minimum level of stimulation required to trigger an action potential in a neuron?
What happens to a neuron when a new drug interferes with the function of dendrites?
What happens to a neuron when a new drug interferes with the function of dendrites?
What are the three parts of all neurons, regardless of their structure or function?
What are the three parts of all neurons, regardless of their structure or function?
When a neurotransmitter is released from an axon terminal, where does it bind?
When a neurotransmitter is released from an axon terminal, where does it bind?
What is the chemical signal that diffuses across the gap between adjacent neurons to convey a message to the next cell?
What is the chemical signal that diffuses across the gap between adjacent neurons to convey a message to the next cell?
Which organ system works faster but has shorter effects, and which organ system works slower but has longer effects?
Which organ system works faster but has shorter effects, and which organ system works slower but has longer effects?
What happens when a new drug blocks the neurotransmitter from being released at the synapse?
What happens when a new drug blocks the neurotransmitter from being released at the synapse?
What is the function of dendrites in a neuron?
What is the function of dendrites in a neuron?
What happens when calcium ions enter the axon terminal at the synapse?
What happens when calcium ions enter the axon terminal at the synapse?
What is the function of the myelin sheath in a neuron?
What is the function of the myelin sheath in a neuron?
What is the correct order of events for the transmission of a signal along a neuron?
What is the correct order of events for the transmission of a signal along a neuron?
What is the function of the axon in a neuron?
What is the function of the axon in a neuron?
What happens to a neuron when a drug interferes with the function of its dendrites?
What happens to a neuron when a drug interferes with the function of its dendrites?
What is the correct order of events at the synapse between a sending and receiving neuron?
What is the correct order of events at the synapse between a sending and receiving neuron?
What are the three parts that all neurons have?
What are the three parts that all neurons have?
When a neurotransmitter is released from an axon terminal, where does it bind?
When a neurotransmitter is released from an axon terminal, where does it bind?
What is a chemical signal that diffuses across the gap between adjacent neurons to convey a message to the next cell?
What is a chemical signal that diffuses across the gap between adjacent neurons to convey a message to the next cell?
Which organ system works faster but has shorter effects, and which one works slower but has longer effects?
Which organ system works faster but has shorter effects, and which one works slower but has longer effects?
Which of the following is not one of the three parts that all neurons have?
Which of the following is not one of the three parts that all neurons have?
What happens to a neuron when it cannot be stimulated to send a signal along its axon?
What happens to a neuron when it cannot be stimulated to send a signal along its axon?
What triggers the release of neurotransmitters into the synaptic cleft?
What triggers the release of neurotransmitters into the synaptic cleft?
What is the function of dendrites in a neuron?
What is the function of dendrites in a neuron?
What is the correct order of events in the transmission of a signal along a neuron?
What is the correct order of events in the transmission of a signal along a neuron?
What is the function of the myelin sheath in a neuron?
What is the function of the myelin sheath in a neuron?
What happens to a neuron when a drug interferes with the function of dendrites?
What happens to a neuron when a drug interferes with the function of dendrites?
What is the correct order of events at the synapse between a sending and receiving neuron?
What is the correct order of events at the synapse between a sending and receiving neuron?
What are the three parts of all neurons?
What are the three parts of all neurons?
When a neurotransmitter is released from an axon terminal, where does it bind?
When a neurotransmitter is released from an axon terminal, where does it bind?
What is the chemical signal that diffuses across the gap between adjacent neurons to convey a message to the next cell?
What is the chemical signal that diffuses across the gap between adjacent neurons to convey a message to the next cell?
Which organ system works faster to coordinate all other organ systems in the body?
Which organ system works faster to coordinate all other organ systems in the body?
Which ion enters the axon terminal during the process of neurotransmitter release?
Which ion enters the axon terminal during the process of neurotransmitter release?
What is the main function of dendrites in a neuron?
What is the main function of dendrites in a neuron?
What happens to a neuron when it cannot be stimulated to send a signal along its axon?
What happens to a neuron when it cannot be stimulated to send a signal along its axon?
What is the function of the myelin sheath?
What is the function of the myelin sheath?
Which ion diffuses through sodium ion gated channels of the receiving neuron during the process of neurotransmitter release?
Which ion diffuses through sodium ion gated channels of the receiving neuron during the process of neurotransmitter release?
Which two organ systems work together to coordinate all other organ systems in the body?
Which two organ systems work together to coordinate all other organ systems in the body?
What is the name of the branch of the autonomic nervous system responsible for preparing the body for a fight or flight response?
What is the name of the branch of the autonomic nervous system responsible for preparing the body for a fight or flight response?
What is the name of the collection of axons and dendrites found outside of the central nervous system?
What is the name of the collection of axons and dendrites found outside of the central nervous system?
What is the function of the parasympathetic branch of the autonomic nervous system?
What is the function of the parasympathetic branch of the autonomic nervous system?
What division of the peripheral nervous system sends sensory information from the skin, skeletal muscles, and tendons?
What division of the peripheral nervous system sends sensory information from the skin, skeletal muscles, and tendons?
What are the four structures that protect the brain and spinal cord?
What are the four structures that protect the brain and spinal cord?
What is the term for the process by which the brain filters out stimuli that are not important or relevant?
What is the term for the process by which the brain filters out stimuli that are not important or relevant?
Which division of the nervous system is responsible for controlling voluntary movements?
Which division of the nervous system is responsible for controlling voluntary movements?
What is the name of the network of neurons responsible for regulating sleep and wakefulness?
What is the name of the network of neurons responsible for regulating sleep and wakefulness?
Study Notes
Functions of Body Components
- The pericardium is a sac that surrounds the heart and attaches to the sternum.
- The peritoneum is a layer of tissue that lines the abdominal cavity and covers the abdominal organs.
- Homeostasis is the ability of the body to maintain a stable internal environment despite changes in the external environment.
Skin Layers
- The skin has three layers: the epidermis, dermis, and hypodermis.
- The dermis is the layer that contains glands, hair follicles, receptors, and blood vessels.
Cell Types and Functions
- Epithelial tissue has two components: epithelial cells and basement membrane.
- Nervous tissue has two types of cells: neurons and neuroglia cells.
- Neurons transmit information, while neuroglia cells provide support and maintenance functions.
Negative Feedback Loops
- Homeostasis is maintained through negative feedback loops.
- A negative feedback loop has three components: receptor, control center, and effector.
- The control center receives information from the receptor and sends a response to the effector.
- The effector carries out the response to maintain homeostasis.
Nervous Tissue Function
- Neurotransmitters are chemical signals that transmit information between neurons.
- Synapses are the gaps between adjacent neurons where neurotransmitters bind to receptors.
- Dendrites receive signals, cell bodies integrate information, and axons transmit signals.
- Myelin provides insulation to increase the speed of signal transmission.
Action Potential
- A neuron has a resting potential of -70mV due to a higher concentration of potassium ions inside the axon and a higher concentration of sodium ions outside the axon.
- During an action potential, sodium ions rush into the axon, and potassium ions leave the axon.
- The Sodium-Potassium Pump maintains the concentration gradients of sodium and potassium ions.
- Repolarization occurs when potassium ions leave the axon, and the neuron returns to its resting potential.
Neurotransmission
- Neurotransmitters are released from the axon terminal and bind to receptors on the postsynaptic neuron.
- The release of neurotransmitters is triggered by calcium ions entering the axon terminal.
- The refractory period is the time immediately after an action potential when the axon is unable to conduct another action potential.
Organ Systems
- The nervous system works faster but has shorter effects, while the endocrine system works slower but has longer effects.
- The nervous system coordinates the functions of all other organ systems in the body.
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Description
Test your knowledge on body membranes and homeostasis with our quiz! From the pericardium to the peritoneum, learn about the different types of membranes that cover our organs. Understand the importance of homeostasis and how our body maintains balance. Challenge yourself with this informative quiz and improve your understanding of the human body!