The vasomotor center ______
A.
regulates the expansion of elastic arteries
B.
controls the contraction and relaxation of precapillary sphincter muscles
C.
increases the strength of heart muscle contraction under low oxygen conditions
D.
sends low frequency action potentials to blood vessels to maintain tone
D
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Which of the following would be a recommended initial treatment for a strain??
A) ?Wrap the area in ice for several hours. B) ?Use the RICE method as for sprains. C) ?Apply heat immediately.
The breakdown of H2CO3 into CO2 and H2O is catalyzed by an enzyme called carbonic anhydrase. Which of the following is a reactant in this reaction?
A. H2CO3 B. H2O C. Carbonic anhydrase
Edema is
A. swelling of lymph nodes due to infection. B. swelling due to excess tissue fluid. C. infection of a lymphatic vessel. D. cancer of lymphoid tissue.
Blood capillaries that supply nourishment for the epidermis are located in the
A. dermal papillae. B. epidermal ridges. C. reticular connective tissue. D. epidermis proper. E. subcutaneous layer.