The All -Or -None Principle, Associated with the Action Potential

question 74

Multiple Choice

The all -or -none principle, associated with the action potential, states that

• A) following an action potential, the membrane will be repolarized by the opening of a potassium channel.
• B) all of the action potentials will be generated from the axon hillock.
• C) the positive feedback loop for the sodium channel is terminated by the inactivation gate.
• D) once membrane potential reaches threshold, an action potential will be generated and that action potential will always be the same magnitude.
• E) there is a positive feedback loop for sodium channels that results in a rapid membrane depolarization.

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Definitions:

Voluntary Nervous System

Refers to the part of the nervous system that governs voluntary movements of the body, typically associated with the somatic nervous system.

Efferent Nerves

Nerves that carry neural impulses away from the central nervous system to effectors such as muscles or glands.

Afferent Nerves

Afferent nerves are sensory nerves that carry information from sensory organs and structures of the body to the brain and spinal cord.

Olfactory Nerves

Cranial nerves responsible for conveying sensory information regarding smells from the nose to the brain, playing a crucial role in the sense of smell.