The diameter of many blood vessels is controlled exclusively by the ________ nervous system, and decreases in the activity of this system result in ________.

A. parasympathetic; vasodilation
B. sympathetic; vasodilation.
C. somatic; vasoconstriction.
D. sympathetic; vasoconstriction.
E. parasympathetic; vasoconstriction


Answer: B

Anatomy & Physiology

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Fill in the blank(s) with correct word

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When intra-alveolar pressure becomes greater than atmospheric pressure,

a. air will flow out of the lungs. b. air will flow into the lungs. c. there will be no air flow. d. both (a) and (b) above. e. none of these answers.

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Which is not true about spermatogenesis?

A. Mature spermatozoa are haploid. B. The process takes place in the walls of the seminiferous tubules. C. The process includes two meiotic divisions. D. Spermatogenesis begins at birth and continues throughout a man's life. E. The final stage of the process is called spermiogenesis.

Anatomy & Physiology

The glenoid cavity of the ________ articulates with the head of the ________.

A. scapula; humerus B. humerus; scapula C. scapula; sternum D. sternum; humerus E. radius; humerus

Anatomy & Physiology