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Questions and Answers
True or false: Depolarization events are caused by voltage-gated calcium channels opening.
True or false: Depolarization events are caused by voltage-gated calcium channels opening.
False
What is the function of neurons in the nervous system?
What is the function of neurons in the nervous system?
True or false: The nervous system is solely responsible for chemical communications in the body, while the endocrine system handles electrical communications.
True or false: The nervous system is solely responsible for chemical communications in the body, while the endocrine system handles electrical communications.
False
What is the function of neurons in the nervous system?
What is the function of neurons in the nervous system?
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True or false: Depolarization events cause voltage to shift towards +55mV by opening sodium channels.
True or false: Depolarization events cause voltage to shift towards +55mV by opening sodium channels.
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What is the function of glia cells in the nervous system?
What is the function of glia cells in the nervous system?
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What is the main difference between the nervous system and the endocrine system?
What is the main difference between the nervous system and the endocrine system?
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True or false: Depolarization events shift voltage towards +55mV by opening sodium channels.
True or false: Depolarization events shift voltage towards +55mV by opening sodium channels.
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What is the difference between the nervous system and the endocrine system?
What is the difference between the nervous system and the endocrine system?
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True or false: Action potentials can be initiated by voltage-gated potassium channels opening at -55mV.
True or false: Action potentials can be initiated by voltage-gated potassium channels opening at -55mV.
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What is the role of Schwann cells in the nervous system?
What is the role of Schwann cells in the nervous system?
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True or false: Action potentials can be triggered at any voltage level.
True or false: Action potentials can be triggered at any voltage level.
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What is the difference between the nervous system and the endocrine system?
What is the difference between the nervous system and the endocrine system?
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True or false: Action potentials are a gradual event, caused by voltage-gated sodium channels opening at -55mV.
True or false: Action potentials are a gradual event, caused by voltage-gated sodium channels opening at -55mV.
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True or false: The function of neurons is to release neurotransmitters that ultimately result in the channeling of electrical signals.
True or false: The function of neurons is to release neurotransmitters that ultimately result in the channeling of electrical signals.
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What is the function of neurons in the nervous system?
What is the function of neurons in the nervous system?
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True or false: Gated ion channels are always open at rest and only close once a stimulus is received.
True or false: Gated ion channels are always open at rest and only close once a stimulus is received.
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What are the components of a neuron?
What are the components of a neuron?
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Which ion is a resting neuron most permeable to?
Which ion is a resting neuron most permeable to?
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What is the role of glia cells in the nervous system?
What is the role of glia cells in the nervous system?
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True or false: Gated ion channels are always open and allow ions to flow freely in and out of the cell.
True or false: Gated ion channels are always open and allow ions to flow freely in and out of the cell.
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What are the components of a neuron?
What are the components of a neuron?
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True or false: Gated ion channels are open at rest, and close once a stimulus is received, leading to an action potential.
True or false: Gated ion channels are open at rest, and close once a stimulus is received, leading to an action potential.
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True or false: A neuron comprises of dendrites, a cell body, an axon, and axon terminal.
True or false: A neuron comprises of dendrites, a cell body, an axon, and axon terminal.
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True or false: Saltatory conduction occurs when electrical signals travel along the entire length of the axon.
True or false: Saltatory conduction occurs when electrical signals travel along the entire length of the axon.
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True or false: Axon insulation with glia cells hinders saltatory conduction, where electrical signals skip along nodes of Ranvier.
True or false: Axon insulation with glia cells hinders saltatory conduction, where electrical signals skip along nodes of Ranvier.
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What is the role of glia cells in the nervous system?
What is the role of glia cells in the nervous system?
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True or false: The myelin sheath around axons is made up of neurons.
True or false: The myelin sheath around axons is made up of neurons.
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What is the peripheral nervous system composed of in vertebrates?
What is the peripheral nervous system composed of in vertebrates?
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What is the junction between the pre- and post-synaptic cell called?
What is the junction between the pre- and post-synaptic cell called?
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True or false: Sensory and motor neurons are not combined in vertebrates to form nerves that are part of the peripheral nervous system.
True or false: Sensory and motor neurons are not combined in vertebrates to form nerves that are part of the peripheral nervous system.
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What is the function of gated ion channels in generating an action potential?
What is the function of gated ion channels in generating an action potential?
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True or false: Voltage-gated calcium channels are located on the axon membrane.
True or false: Voltage-gated calcium channels are located on the axon membrane.
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What is the peripheral nervous system?
What is the peripheral nervous system?
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What is the resting membrane potential of a neuron?
What is the resting membrane potential of a neuron?
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True or false: Glia cells are not significant for the proper functioning of neurons.
True or false: Glia cells are not significant for the proper functioning of neurons.
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True or false: Voltage-gated calcium channels at the axon terminal prevent the release of neurotransmitters into the synaptic cleft.
True or false: Voltage-gated calcium channels at the axon terminal prevent the release of neurotransmitters into the synaptic cleft.
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What is the voltage threshold required to generate an action potential?
What is the voltage threshold required to generate an action potential?
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What is the function of glia cells in the nervous system?
What is the function of glia cells in the nervous system?
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True or false: Voltage-gated potassium channels at the axon terminal allow for synaptic vesicles to release neurotransmitters into the synaptic cleft.
True or false: Voltage-gated potassium channels at the axon terminal allow for synaptic vesicles to release neurotransmitters into the synaptic cleft.
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True or false: The membrane potential can be pushed to -55mV through the summation of inhibitory post-synaptic potentials.
True or false: The membrane potential can be pushed to -55mV through the summation of inhibitory post-synaptic potentials.
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True or false: Spatial summation occurs when multiple synapses are activated simultaneously.
True or false: Spatial summation occurs when multiple synapses are activated simultaneously.
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What establishes and maintains the resting membrane potential of a neuron?
What establishes and maintains the resting membrane potential of a neuron?
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How is the resting membrane potential of a neuron established and maintained?
How is the resting membrane potential of a neuron established and maintained?
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How do neurotransmitters travel from the synaptic cleft to the post-synaptic cell?
How do neurotransmitters travel from the synaptic cleft to the post-synaptic cell?
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True or false: The re-distribution of electrolytes does not play a role in the establishment and maintenance of the resting membrane potential of a neuron.
True or false: The re-distribution of electrolytes does not play a role in the establishment and maintenance of the resting membrane potential of a neuron.
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True or false: Temporal and spatial summation of inhibitory post-synaptic potentials can push the membrane potential to -55mV.
True or false: Temporal and spatial summation of inhibitory post-synaptic potentials can push the membrane potential to -55mV.
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What is the key factor in rapidly shifting the membrane potential to an action potential?
What is the key factor in rapidly shifting the membrane potential to an action potential?
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True or false: Neurotransmitters do not need to be removed from the synaptic cleft to prevent continuous firing.
True or false: Neurotransmitters do not need to be removed from the synaptic cleft to prevent continuous firing.
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True or false: Gated ion channels do not play a significant role in rapidly shifting the membrane potential to an action potential.
True or false: Gated ion channels do not play a significant role in rapidly shifting the membrane potential to an action potential.
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What is the key to significantly and rapidly shifting the membrane potential to an action potential?
What is the key to significantly and rapidly shifting the membrane potential to an action potential?
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What is the function of motor proteins in the nervous system?
What is the function of motor proteins in the nervous system?
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What is the key to rapidly shifting the membrane potential to an action potential?
What is the key to rapidly shifting the membrane potential to an action potential?
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True or false: Neurotransmitters are always immediately degraded once released into the synaptic cleft.
True or false: Neurotransmitters are always immediately degraded once released into the synaptic cleft.
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True or false: Neurotransmitters are broken down and recycled after they are released into the synaptic cleft.
True or false: Neurotransmitters are broken down and recycled after they are released into the synaptic cleft.
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What are nerves in the peripheral nervous system composed of?
What are nerves in the peripheral nervous system composed of?
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True or false: Neuroplasticity does not allow for the modification and strengthening of neural connections through repeated cognitive activities.
True or false: Neuroplasticity does not allow for the modification and strengthening of neural connections through repeated cognitive activities.
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True or false: To generate an action potential, the membrane potential must rise from -70 to -45 mV.
True or false: To generate an action potential, the membrane potential must rise from -70 to -45 mV.
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True or false: Neuroplasticity refers to the inability of the brain to change and adapt throughout life.
True or false: Neuroplasticity refers to the inability of the brain to change and adapt throughout life.
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What is the membrane potential required to generate an action potential?
What is the membrane potential required to generate an action potential?
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True or false: Neuroplasticity only occurs during early development and cannot be changed in adulthood.
True or false: Neuroplasticity only occurs during early development and cannot be changed in adulthood.
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What is the peripheral nervous system composed of?
What is the peripheral nervous system composed of?
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What is the threshold for generating an action potential?
What is the threshold for generating an action potential?
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What is the composition of a neuron?
What is the composition of a neuron?
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True or false: The speed of nerve impulses is faster in unmyelinated axons compared to myelinated axons.
True or false: The speed of nerve impulses is faster in unmyelinated axons compared to myelinated axons.
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How do neurotransmitters travel to the post-synaptic cell?
How do neurotransmitters travel to the post-synaptic cell?
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What is the junction between the pre- and post-synaptic cell called?
What is the junction between the pre- and post-synaptic cell called?
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What is the junction between the pre- and post-synaptic cell called?
What is the junction between the pre- and post-synaptic cell called?
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True or false: The synapse occurs at the junction between the pre- and post-synaptic cell, called the synaptic cleft.
True or false: The synapse occurs at the junction between the pre- and post-synaptic cell, called the synaptic cleft.
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True or false: The opening of chloride channels can lead to a depolarization event.
True or false: The opening of chloride channels can lead to a depolarization event.
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True or false: Gated ion channels only open in response to electrical stimuli.
True or false: Gated ion channels only open in response to electrical stimuli.
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True or false: Synaptic plasticity refers to the ability of neurons to change their structure and function in response to experience.
True or false: Synaptic plasticity refers to the ability of neurons to change their structure and function in response to experience.
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True or false: Inhibitory post-synaptic potentials always cause the membrane potential to become more positive.
True or false: Inhibitory post-synaptic potentials always cause the membrane potential to become more positive.
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True or false: The release of neurotransmitters can lead to the activation of ionotropic receptors.
True or false: The release of neurotransmitters can lead to the activation of ionotropic receptors.
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True or false: Neurotransmitters travel by active transport to the surface receptors on the post-synaptic cell.
True or false: Neurotransmitters travel by active transport to the surface receptors on the post-synaptic cell.
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How do neurotransmitters travel to the surface receptors on the post-synaptic cell?
How do neurotransmitters travel to the surface receptors on the post-synaptic cell?
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How do neurotransmitters travel to the surface receptors on the post-synaptic cell?
How do neurotransmitters travel to the surface receptors on the post-synaptic cell?
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What establishes and maintains the resting membrane potential of a neuron?
What establishes and maintains the resting membrane potential of a neuron?
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Study Notes
- The nervous system is the body's electrical communications system, while the endocrine system is the chemical communications system.
- Neurons are the featured cell of the nervous system, and their function is to channel electrical signals that ultimately end with the release of neurotransmitters.
- A neuron consists of dendrites, a cell body, an axon, and axon terminal.
- In vertebrates, sensory and motor neurons are bundled together to form nerves that are part of the peripheral nervous system.
- Glia cells are support cells that are necessary for the proper functioning of neurons.
- The resting membrane potential of a neuron is established and maintained by the re-distribution of electrolytes.
- Gated ion channels are key to significantly and rapidly shifting the membrane potential to an action potential.
- To generate an action potential, the membrane potential needs to rise from -70 to -55 mV.
- The junction between the pre- and post-synaptic cell, where the synapse occurs, is called the synaptic cleft.
- Neurotransmitters are secreted and travel by diffusion to the surface receptors on the post-synaptic cell.
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Description
"Test your knowledge on the fascinating world of neurons and synapses with our quiz! From the role of the nervous and endocrine systems to the structure of neurons and their electrical signals, this quiz covers it all. Discover the importance of glia cells and gated ion channels, and learn about the complex process of neurotransmitter release. Impress your friends with your newfound knowledge on the inner workings of the brain!"
