What term means excessive urination?
A. Glycosuria
B. Polydipsia
C. Hyperglycemia
D. Polyuria
Answer: D
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What is the role of vitamin C in bone growth?
A. It is necessary for the absorption of calcium by the digestive system. B. It stimulates osteoblast activity. C. It promotes the cross-linking of collagen molecules in bone. D. It promotes synthesis of the glycosaminoglycans (GAGs) of the bone matrix. E. It promotes proliferation of cartilage at the epiphyseal plates.
Define countercurrent multiplication as it occurs in the kidneys
A) The exchange of substances in the adjacent limbs of the nephron loop containing fluid moving in opposite directions. B) The exchange of substances in the adjacent limbs of the nephron loop containing fluid moving in the same directions. C) The cycling of urea from the collecting duct to the nephron loop and back. D) The bulk reabsorption of substances in the proximal convoluted tubule and the bulk movement of water due to osmosis. E) The secretion of ions in response to hormones in the distal convoluted tubule.
Why does hair turn gray or white as people age?
A. Keratin production decreases. B. Melanocytes die out. C. The shaft becomes rounder in cross-section. D. Mitosis slows down in the hair shaft. E. Blood supply to the scalp diminishes.
Suppose there was a drug that could dramatically decrease mucus secretion. Which of the following may be a side effect of this drug?
A. Decreased mucus secretion would not affect a person's special senses. B. Decreased mucus secretion would enhance a person's ability to smell due to less of a barrier between the odors and the olfactory organ. C. Decreased mucus secretion would also decrease a person's ability to smell due to less fluid associated with the olfactory organ. D. Decreased mucus secretion would enhance a person's sense of taste due to the lack of mucus blocking access to the taste receptors.