If red blood cells are placed in a(n) ____________________ solution, water will enter the cells by osmosis
Fill in the blank(s) with correct word
hypotonic
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A product of the metabolism of certain nucleic acid bases is
A. uric acid. B. ammonia. C. water. D. urea.
Why does the reflux of gastric contents into the esophagus occur?
a. increased amounts of mucous produced by the stomach. b. increased hydrochloric acid production by the parietal cells. c. relaxation of the cardiac sphincter. d. spasms of the submucosal layer of the stomach wall. e. contraction of the pyloric sphincter.
Along with the nervous system, the ______ system coordinates the various activities of body parts.
A) digestive B) endocrine C) circulatory D) respiratory E) excretory
In some forms of diabetes, an insensitivity to insulin seems to be present. This insensitivity could be the result of
A. up-regulation. B. over-regulation. C. down-regulation. D. a lack of regulation. E. modulation.