During the Rising (Depolarizing) Phase of a Neuronal Action Potential

question 18

Multiple Choice

During the rising (depolarizing) phase of a neuronal action potential,

• A) P_K+ becomes much greater than P_Na+.
• B) P_Na+ becomes much greater than P_K+.
• C) P_K+ is the same as P_Na+.
• D) Na⁺ efflux (flow out of the cell) occurs.
• E) K⁺ flows rapidly into the cell.

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Definitions:

Unaroused State

A condition of not experiencing sexual arousal, where there is no physiological readiness for sexual activity.

Circumcision

A surgical procedure that involves the removal of the foreskin from the penis, often performed for religious, cultural, or medical reasons.

Smegma

A substance composed of dead skin cells and oils, which can accumulate in genital areas, such as under the foreskin in males and around the clitoral hood in females.

Foreskin

The retractable roll of skin covering the end of the penis.