Neuronal Sodium Potassium Pump Mechanism

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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?

Peak

Resting state (correct)

Repolarization

Depolarization

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?

Saltatory conduction Signup and view all the answers

What is necessary for the action potential to spread from active to inactive areas?

Depolarization of the inactive area to threshold Signup and view all the answers

What is the term for the time period between the application of a stimulus and the start of the response?

Latent period Signup and view all the answers

What is the characteristic of the conduction of action potentials in unmyelinated nerve fibers?

The action potential spreads along every portion of the membrane Signup and view all the answers

What is the effect of the action potential on the last part of the axon, regardless of the length of the axon?

It remains the same as the original Signup and view all the answers

What is the nature of the action potential as it travels down the nerve fiber?

It does not travel down the nerve fiber Signup and view all the answers

What is the status of voltage-gated K+ channels during the resting membrane potential?

Closed Signup and view all the answers

What happens to the original active area after the action potential has spread to the adjacent area?

It returns to resting potential Signup and view all the answers

What is the process by which excess potassium ions leave the cell during an action potential?

Leakage Signup and view all the answers

What is the primary ion responsible for depolarization during an action potential?

Sodium (Na) Signup and view all the answers

What is the critical level of membrane potential that triggers an action potential?

-65 mV Signup and view all the answers

What happens to the voltage-gated Na channels in the inactive area when it reaches threshold?

They are all thrown open Signup and view all the answers

What can be compared to the action potential propagating along the nerve fiber?

A wave at a stadium Signup and view all the answers

What is the period during which a neuron is unable to generate another action potential due to the inactivation of voltage-gated Na+ channels?

Refractory period Signup and view all the answers

What is the primary mechanism of neurotransmission during an action potential?

Neurotransmitter release Signup and view all the answers