"Refractory Periods" Quiz

Use Figure 12-2 to answer the following questions: When is the neuron in the relative refractory period?

4

Which area on the graph shows when the neuron is in the relative refractory period?

4

The period during which an excitable membrane cannot respond to further stimulation is the ________ period.

Absolute Refractory

The neuron cannot respond to a second stimulus, no matter how strong

Absolute Refractory Period

Also called a nerve impulse transmitted by axons.

Action Potential

The interior of the cell becomes less negative due to an influx of sodium ions.

Depolarization

How would the absolute refractory period be affected if voltage-regulated sodium channels failed to inactivate?

It would last indefinitely

The period during which an excitable membrane can respond again, but only if the stimulus is greater than the threshold stimulus, is the ________ period.

Relative Refractory

An exceptionally strong stimulus can trigger a response

Relative Refractory Period

The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability.

Repolarization