The Primary Motor Area

question 145

Multiple Choice

The primary motor area

• A) contains sensory neurons for the face in its inferior portion.
• B) contains a smaller area for control of the hands than for control of the legs.
• C) contains neurons that control smooth muscle.
• D) contains more motor neurons for the thighs than the mouth.
• E) contains a larger area for control of the hand and fingers than for control of the arm and elbow.

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Definitions:

Parasympathetic Nervous System

Part of the autonomic nervous system responsible for conserving energy and promoting the "rest and digest" response in the body.

Somatic Nervous System

The part of the peripheral nervous system that controls voluntary movements of skeletal muscles.

Myelin Sheath

A fatty layer that encases the axons of some neurons, serving to speed up the transmission of nerve impulses.

Nerve Impulses

Electrical signals that transmit information along the nerve fibers, essential for communication within the nervous system.