A Motor Unit Consists of

question 74

Multiple Choice

A motor unit consists of

• A) one neuron and all the skeletal muscle fibers it controls.
• B) one skeletal muscle fiber and all the neurons that control that fiber.
• C) one skeletal muscle fiber and the neuron that controls that fiber.
• D) one axon terminal branch and the myofibrils it controls.

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Definitions:

Midbrain

A portion of the brainstem that plays an important role in vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature regulation.

Olfactory Bulbs

Structures located at the base of the brain that process information about odors detected by cells in the nasal cavity.

Longitudinal Fissure

The deep groove that separates the two hemispheres of the brain.

Cerebral Hemispheres

The two halves of the brain, divided by the longitudinal fissure, responsible for controlling opposite sides of the body and different aspects of cognitive function.