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Neuron Membrane Potential and Action Potential

11 Questions

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Neuron Membrane Potential and Action Potential

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Questions and Answers

What is the primary trigger for the rapid opening of voltage-gated sodium channels?

Threshold potential (correct)

Inactivation of potassium channels

Conformational changes of voltage-gated potassium channels

Changes in membrane permeability to ions

What is the net result of the opening of voltage-gated sodium and potassium channels?

Generation of an action potential (correct)

Conformational changes of voltage-gated channels

Inhibition of an action potential

Changes in membrane permeability to ions

What is the function of the inactivation gate of voltage-gated sodium channels?

Maintaining the channel in an open state

Closing of the channel (correct)

Rapid opening of the channel

Delayed opening of the channel

What is the primary difference between voltage-gated sodium and potassium channels?

Sodium channels open rapidly, while potassium channels open slowly Signup and view all the answers

What is the effect of the activation gate of voltage-gated sodium channels?

Rapid opening of the channel Signup and view all the answers

What is the direction of the movement of Na+ ions during an action potential?

Into the cell Signup and view all the answers

What is the function of voltage-gated potassium channels during an action potential?

To allow potassium ions to leave the cell Signup and view all the answers

What is the threshold potential?

-60 mV Signup and view all the answers

What is the duration of an action potential?

1 msec Signup and view all the answers

What happens to the membrane potential during depolarization?

It becomes more positive Signup and view all the answers

What is the role of inactivation gates in voltage-gated sodium channels?

To block sodium ions from entering the cell Signup and view all the answers