The End of the Rising Phase of an Action Potential

question 135

Multiple Choice

The end of the rising phase of an action potential occurs when the

• A) sodium channels close.
• B) sodium channels open.
• C) potassium channels open.
• D) potassium channels close.
• E) both A and D

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Definitions:

Stressor

Any event, situation, or stimulus that causes stress or strain to an individual.

Oligodendrocytes

Glial cells in the central nervous system that produce myelin, a substance that insulates nerve fibers and speeds up signal transmission.

Schwann Cells

A type of glial cell located in the peripheral nervous system that is essential for the maintenance of nerve fibers and the formation of myelin.

Myelin

A fatty substance that surrounds and insulates the axons of many neurons, facilitating the rapid transmission of electrical impulses.