The muscle that helps to control testicular temperature by changing wrinkling of the scrotum is the:

a. detrusor
b. dartos
c. cremaster
d. extrusor


Answer: b. dartos

Anatomy & Physiology

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If the thoracic duct were tied off, which of the following classes of nutrients would not enter the circulatory system at their normal rate?

A. amino acids B. glucose C. lipids D. disaccharides E. monosaccharides

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To prevent depletion of a substrate, the product of a metabolic pathway will

A. increase enzyme activity through positive feedback. B. catalyze its own production. C. turn off an enzyme early in the pathway. D. occupy the active site of an enzyme early in the pathway.

Anatomy & Physiology