Which cell type, found in connective tissue proper and close to blood vessels, secretes heparin and histamine?
A. Mast cell
B. Fibroblast
C. Plasma cell
D. Adipocyte
E. Mesenchymal cell
Answer: A
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Parathyroid hormone does all of the following except
A) stimulate osteoclast activity. B) inhibit osteoblast activity. C) build up bone. D) stimulate the formation and secretion of calcitriol at the kidneys. E) enhance the reabsorption of calcium at the kidneys.
Which sex tends to lose more bone mass with aging?
A. Women B. Men
Before converting amino acids into intermediates for energy metabolism, they must first undergo __________.
A) detoxification. B) delousing. C) denaturation. D) depeptidization. E) deamination.
The lining of the alveolus is coated with an oily secretion called ____________________.
A. surfactant B. mucus C. saliva D. membrane E. none of the choices are correct.