All of the Following Are Found on the Surface of the Arm

question 823

Multiple Choice

All of the following are found on the surface of the arm EXCEPT the ________.

• A) brachialis
• B) biceps brachii
• C) sternocleidomastoid
• D) triceps brachii

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Definitions:

Excitation Threshold

The voltage difference between a neuron’s interior and exterior that, if exceeded, causes the neuron to fire.

Action Potential

A temporary reversal of electric polarization of the membrane of a nerve cell or muscle cell, involved in the transmission of signals.

Nodes of Ranvier

Gaps in the myelin sheath of nerve fibers that facilitate the rapid conduction of electrical impulses along the neuron.

Myelinated Neuron

A nerve cell that features a myelin sheath around its axon, enhancing the speed of electrical transmission of signals.