The kidneys are stimulated to produce renin ________.
A) when the peritubular capillaries are dilated
B) when the pH of the urine decreases
C) by a decrease in the blood pressure
D) when the specific gravity of urine rises above 1.10
C) by a decrease in the blood pressure
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How does contraction of smooth muscle differ from that of skeletal muscle? Include the following in your answer : Ca2+ ions, troponin, tropomyosin, calmodulin, myosin-binding sites, light-chain region, actin, myosin, and cross bridge cycling
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Memory cells are
a. hippocampal neurons. b. exocrine cells that produce milk. c. dormant, non-secreting B-cells. d. dormant, non-secreting T-cells. e. antibody secreting B-cells.