The pelvic diaphragm is formed by the

A. levator ani only.
B. deep transverse perineum muscle.
C. levator ani and coccygeus muscles.
D. sphincter urethrae and sphincter ani muscles.
E. coccygeus only.


C

Anatomy & Physiology

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What occurs when gamma motor neurons to a muscle are activated?

A. The muscle lengthens. B. The muscle spindle goes slack. C. Action potential firing increases in afferent neurons from the muscle spindles. D. The contractile ends of intrafusal fibers elongate. E. Extrafusal muscle fibers within that muscle are inhibited from contracting.

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What might account for a soldier experiencing syncope after standing at attention for a long period of time?

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Anatomy & Physiology