How long do platelets remain functional for?
a. 10 days
b. 7 days
c. 5 days
d. 2 days
e. 10 hours
a
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Each of the following local factors produces the relaxation of arteriolar smooth muscle except increased
a. acid. b. carbon dioxide. c. osmolarity. d. oxygen. e. potassium.
Which of the following is not true of electrical synapses?
A. They facilitate quick transmission of signals. B. Ions diffuse directly from one cell to the next. C. They are useful for integrating information and making decisions. D. Adjacent cells are joined by gap junctions. E. Cardiac muscle cells are joined by such synapses.
The microscope slide rests on the __________ while being viewed.
a. base b. iris c. condenser d. stage
An athlete decides to run 10 miles at noon during the hottest day of the summer. Which of the following conditions is most likely to occur?
A) atherosclerosis B) vasodilation C) varicose veins D) vasoconstriction