When pure water is consumed,
A) the ECF becomes hypertonic to the ICF.
B) a fluid shift occurs and the volume of the ICF decreases.
C) osmolarities of the two fluid compartments fall.
D) the volume of the ECF decreases.
E) the volume of the ICF decreases.
C
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During the rising (depolarizing) phase of a neuronal action potential,
A. PK+ becomes much greater than PNa+. B. K+ flows rapidly into the cell. C. PK+ is the same as PNa+. D. Na+ efflux (flow out of the cell) occurs. E. PNa+ becomes much greater than PK+.
AB ? A + B is to decomposition as A + B ? AB is to
A) exchange. B) synthesis. C) combustion. D) replacement. E) metabolism.
How fast would the heart beat if the AV node were diseased, as occurs in total heart block?
A. More than 90 beats per minute B. An average of 75 beats per minute C. 40 to 60 beats per minute D. 20 to 40 beats per minute E. The heart rate would be very erratic and rates would fluctuate widely.
The mitral valve is also called the ____ valve.
a. bicuspid b. tricuspid c. aortic semilunar d. pulmonary semilunar