The first heart sound
a. occurs when the AV valves open
b. occurs when the semilunar valves close
c. signals the onset of ventricular diastole
d. occurs when the AV valves close, and signals the onset of ventricular systole
e. occurs when the semilunar valves close, and signals the onset of ventricular diastole
D
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The ____ establish the medullary vertical osmotic gradient by means of countercurrent multiplication
a. loops of Henle of juxtamedullary nephrons b. loops of Henle of cortical nephrons c. vasa recta of juxtamedullary nephrons d. vasa recta of cortical nephrons e. vasopressin-secreting cells
Annie has just eaten a large order of heavily salted French fries, some pickled eggs, and some cheese. How will consuming this much salt affect her physiology?
A) There will be a temporary increase in blood volume. B) There will be a shift in the pH of her body fluids to the higher side of the pH scale. C) It will cause a prolonged increase in the osmolality of the blood. D) She will experience hypotension.
Which of the following is NOT an example of computer hardware?
a. modem c. printer b. mouse d. Word Perfect
Parathyroid hormone functions in all of the following ways except
A) stimulating osteoclast activity. B) increasing the rate of calcium absorption. C) decreasing the rate of calcium excretion. D) raising the level of calcium ion in the blood. E) inhibiting calcitonin secretion.