Under which set of conditions would the diameter of a peripheral blood vessel be the greatest?
A) decreased parasympathetic stimulation
B) increased sympathetic stimulation
C) increased parasympathetic stimulation
D) decreased sympathetic stimulation
E) None of the answers are correct.
D) decreased sympathetic stimulation
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Two thieves steal jewelry, and then drop it as they are escaping. The police recover the jewelry, and an officer explains on the evening news that fingerprints were obtained from the back of a watch. The thieves, whose prints are not on file, believe that they can escape prosecution by using acid to remove the epidermis on their fingerpads, so as not to be a match for the fingerprints on the watch. They are wrong because
A. the prints arise from friction ridges of the dermis, which are not destroyed. B. the prints arise from the subcutaneous layer, which is not destroyed. C. the epidermis will regrow the friction ridges in a day. D. the friction ridges will not grow back in the same pattern.
Which of the following is true about the mode of secretion of exocrine glands?
A) Holocrine cells are slightly damaged by the secretory process, but repair themselves. B) Apocrine cells are destroyed, then replaced, after secretion. C) These glands are ductless. D) Merocrine glands are not altered by the secretory process.
Mechanoreceptors respond to
A. a change in temperature. B. irritation of nerve endings. C. compression of receptors. D. binding of molecules to membrane receptors. E. light striking the receptors.
Which is one of the major inhibitory neurotransmitters in the CNS?
A. Glutamate B. Gamma-aminobutyric acid (GABA) C. Beta-endorphin D. Norepinephrine E. Dopamine