Podcast
Questions and Answers
What is the state of the inactivation gates of the sodium channel during the resting state?
What is the state of the inactivation gates of the sodium channel during the resting state?
- OPEN (correct)
- PARTIALLY OPEN
- NOT DEFINED
- CLOSED
During which stage of the action potential is the activation gate of the sodium channel closed?
During which stage of the action potential is the activation gate of the sodium channel closed?
- Peak
- Resting state (correct)
- Repolarization
- Depolarization
What is the direction of the action potential once it is triggered?
What is the direction of the action potential once it is triggered?
- It stays at the point of origin
- It travels in all directions away from the stimulus (correct)
- It travels only towards the axon terminal
- It travels only towards the dendrites
What is the type of conduction that occurs in myelinated fibers?
What is the type of conduction that occurs in myelinated fibers?
What is necessary for the action potential to spread from active to inactive areas?
What is necessary for the action potential to spread from active to inactive areas?
What is the term for the time period between the application of a stimulus and the start of the response?
What is the term for the time period between the application of a stimulus and the start of the response?
What is the characteristic of the conduction of action potentials in unmyelinated nerve fibers?
What is the characteristic of the conduction of action potentials in unmyelinated nerve fibers?
What is the effect of the action potential on the last part of the axon, regardless of the length of the axon?
What is the effect of the action potential on the last part of the axon, regardless of the length of the axon?
What is the nature of the action potential as it travels down the nerve fiber?
What is the nature of the action potential as it travels down the nerve fiber?
What is the status of voltage-gated K+ channels during the resting membrane potential?
What is the status of voltage-gated K+ channels during the resting membrane potential?
What happens to the original active area after the action potential has spread to the adjacent area?
What happens to the original active area after the action potential has spread to the adjacent area?
What is the process by which excess potassium ions leave the cell during an action potential?
What is the process by which excess potassium ions leave the cell during an action potential?
What is the primary ion responsible for depolarization during an action potential?
What is the primary ion responsible for depolarization during an action potential?
What is the critical level of membrane potential that triggers an action potential?
What is the critical level of membrane potential that triggers an action potential?
What happens to the voltage-gated Na channels in the inactive area when it reaches threshold?
What happens to the voltage-gated Na channels in the inactive area when it reaches threshold?
What can be compared to the action potential propagating along the nerve fiber?
What can be compared to the action potential propagating along the nerve fiber?
What is the period during which a neuron is unable to generate another action potential due to the inactivation of voltage-gated Na+ channels?
What is the period during which a neuron is unable to generate another action potential due to the inactivation of voltage-gated Na+ channels?
What is the primary mechanism of neurotransmission during an action potential?
What is the primary mechanism of neurotransmission during an action potential?
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