Animation quiz 43.2 The Action Potential

Refer to the table. A student created this table as a study guide describing one of the five phases of a neuronal action potential.

A=rapid diffusion into cell; B=equal movement in an out of cell; C=Most positive value

After a stimulus results in initial depolarization of a region of cell membrane of a neuron a threshold voltage is reached. Once this happens, which of the following takes place?

A large number of voltage-gated sodium channels quickly open, causing a rapid change in membrane potential.

Refer to the table listing the phases of an action potential in a neuron. Indicate any information listed that is not accurate as written.

The phase name for 2 and 3 should be reversed.

At the peak of the action potential,

Voltage-gated sodium channels close and voltage-gated potassium channels open.