Infection with the HIV virus occurs through
A) eating contaminated food.
B) airborne droplets from coughs and sneezes.
C) intimate contact with an infected person's body fluids.
D) casual contact with an infected individual.
E) sharing clothes with an infected individual.
C
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A diuretic may cause which of the following effects?
A) Decreased cardiac output B) Increased sodium reabsorption C) Decreased sodium in urine D) Increased filtrate volume
If the stapedius muscle is unable to reduce movement of the ossicles as a unit, how is hearing affected?
A) We hear no sound. B) Hearing is not affected. C) Sounds will be softer than normal. D) Sounds will be louder than normal.
The function of the pericardial fluid is to
A) store calcium for the heart. B) provide oxygen to the heart. C) provide fuel to the heart. D) remove waste products from the heart. E) reduce friction between the heart and the pericardium.
Saltatory conduction
a. occurs in unmyelinated nerve fibers. b. is slower than conduction by local current flow because the myelin acts as an insulator to slow the impulse down. c. involves the impulse jumping from one node of Ranvier to the adjacent node. d. refers to the action potential spreading from one Schwann cell to the adjacent Schwann cell. e. more than one of these answers.