Testosterone is responsible for all of the following except ________.
A. sleep-wake cycles
B. low voice
C. maturation of male reproductive organs
D. sperm production
Answer: A
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Neural control of respiration
a. involves factors that regulate the magnitude of ventilation to match physiological needs. b. factors that modify respiratory activity to serve other purposes. c. the neural pattern generator program responsible for the alternating inspiration/expiration rhythm. d. all of these. e. none of these.
Exposure to the bacterium Clostridium tetani causes continuous release of acetylcholine. What effect does this have on smooth muscle?
A. Spastic paralysis B. Flaccid paralysis C. No effect D. Lockjaw E. Myocardial atrophy
Chondrocytes are to cartilage as osteocytes are to
A) blood. B) epithelium. C) fat. D) bone. E) neural tissue.
The structures that connect cardiac muscle cells are
A. intercalated discs. B. motor end plates. C. neuromuscular junctions. D. intervertebral discs.