Axons

question 79

Multiple Choice

Axons

• A) contain the nucleus.
• B) are numerous extensions from each neuron.
• C) do not have a trigger zone.
• D) have a distal portion that branches to form the presynaptic terminals.
• E) do not have a resting membrane potential.

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Definitions:

Depolarizes

The process by which the electrical charge of a neuron's membrane decreases, moving towards zero or becoming less negative.

Hyperpolarizes

Refers to an increase in the membrane potential of a cell, making the interior more negatively charged relative to the outside and reducing the likelihood of generating an action potential.

Absolute Refractory Period

A period immediately following the transmission of an impulse in nerve or muscle in which it cannot respond to another stimulus, ensuring the unidirectional flow of impulses.

Cardiac Muscle Cells

Specialized muscle cells found in the heart that have the ability to contract automatically and rhythmically, contributing to heart contraction.