The Relative Refractory Period Occurs After the Action Potential Is

question 23

Multiple Choice

The relative refractory period occurs after the action potential is complete because of the

• A) lingering inactivation of the voltage-gated Na⁺ channels
• B) slowness of the voltage-gated K⁺ channels
• C) action of the sodium-potassium pumps
• D) lingering inactivation of the voltage-gated Na⁺ channels and slowness of the voltage-gated K⁺ channels
• E) slowness of the voltage-gated K⁺ channels and action of the sodium-potassium pumps

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Definitions:

Skeletal Muscle

A type of striated muscle tissue that is attached to bones, enabling voluntary movement of the body through contraction and relaxation.

Smooth Muscle

A type of muscle tissue found in the walls of hollow organs (such as intestines and blood vessels) that contracts involuntarily, controlled by the autonomic nervous system.

Skeletal Muscle

Skeletal muscle is a type of striated muscle tissue that is attached to bones by tendons and is under voluntary control, enabling movement of the skeleton.

Cardiac Muscle

A specialized form of striated muscle found exclusively in the heart, characterized by its ability to contract involuntarily and rhythmically.