The neurotransmitter orexin plays a role in:
A) the regulation of metabolism. B) the promotion of sleepiness.
C) body temperature regulation. D) the promotion of wakefulness.
Answer: D
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Which of the following carry oxygen-poor blood?
A. Pulmonary veins and vena cavae B. Aorta and pulmonary veins C. Aorta and vena cavae D. Venae cavae and pulmonary arteries E. Pulmonary veins and pulmonary arteries
Each of the following is a means of generating or holding heat in the body except
a. diminished sweating. b. exercising. c. shivering. d. vasodilation of blood vessels in the skin. e. behavioral adaptations.
The term light adaptation refers to
a. the changes that occur in the visual pigment system when going from a dark into a light environment. b. the evolutionary changes that enable a species to maintain a diurnal life style. c. the changes that occur in visual pigment system when going from a light into a dark environment. d. none of these.
the tetany that is seen in lockjaw is the same as the tetany produced by hypocalcemia
a. true b. false