What action causes the first heart sound heard through a stethoscope?

A) Opening of the semilunar valves
B) Closing of the atrioventricular valves
C) Closing of the semilunar valves
D) Opening of the atrioventricular valves


Answer: B

Anatomy & Physiology

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Movement of the endolymph in the semicircular canals

A) produces a rushing sound. B) allows us to hear low tones. C) signals rotational movements. D) signals body position with respect to gravity. E) signals linear acceleration.

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At the optic chiasm

A.  all axons from each optic nerve cross to the opposite side of the brain. B.  none of the axons actually cross to the opposite side of the brain. C.  ganglion cell axons from the medial region of each retina cross to the opposite side of the brain. D.  ganglion cell axons from the lateral region of each retina cross to the opposite side of the brain.

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Contrast the visual deficits that would result from someone having a mutation in the gene for rhodopsin versus a mutation in one of the genes for a photopsin

What will be an ideal response?

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Which system is concerned with internal organs (viscera)?

A. Autonomic B. Somatic C. Somatic and autonomic

Anatomy & Physiology