Filtration is defined as:
A. dissolving
B. separation of substances
C. water loss
D. reabsorption
b
Rationale: Filtration is the separation of substances. If the kidneys were not able to concentrate filtrate produced by glo-merular filtration, losses of fluid would lead to fatal dehydration in a matter of hours.
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To understand the symbols in a medical dictionary, one should:
a. read the introduction. b. make a cheat sheet. c. look in the index. d. look up the symbol on the Internet.
A patient arrives at the emergency department complaining of pain in the calf of his left leg and shortness of breath. A "stat" D dimer is ordered. Why is this useful information for this patient's care?
a. An elevated D dimer supports the possibility of deep vein thrombosis. b. An elevated D dimer is diagnostic for deep vein thrombosis. c. A normal D dimer is diagnostic for deep vein thrombosis. d. This was not an appropriate test to order on this patient.