Unlike all other amine derived hormones, thyroid hormones
A. bind to membrane receptors to elicit a response.
B. activate second messengers via binding to a membrane receptor.
C. are derived from cholesterol.
D. are produced by the gonads.
E. bind to intracellular receptors rather than to membrane-bound receptors to elicit a response.
E. bind to intracellular receptors rather than to membrane-bound receptors to elicit a response.
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List the components of a homeostatic feedback loop. Use the regulation of fluid volume to illustrate your answer.
What will be an ideal response?
After consuming an antacid like Rolaids, ________.
A. the stomach would absorb water B. the pH of the stomach fluid would increase C. the pH of the stomach fluid would decrease D. HCl production would decrease
This animal has jointed legs, a complete
digestive system, and an open circulatory system. This animal is ___.
a. a centipede b. a butterfly c. a horseshoe crab d. a spider e. all of these
Animals that are hermaphroditic usually
a. fertilize their own eggs. b. cross-fertilize. c. donate eggs to other individuals. d. cannot reproduce sexually. e. fit all of these descriptions.