Which water-soluble vitamin must first be bound to the intrinsic factor secreted by the gastric mucosa before it can be absorbed by the intestinal epithelium?
A) vitamin B2 (riboflavin)
B) vitamin C (ascorbic acid)
C) vitamin B12 (cobalamin)
D) vitamin B5 (pantothenic acid)
E) vitamin B6 (pyridoxine)
C) vitamin B12 (cobalamin)
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A county fair held a water-drinking contest where people competed to see who could drink the most water in a set amount of time. During the competition, a man drank three gallons of water in under an hour and a half. Unfortunately, this killed him several hours after he won the competition. What killed the man?
A. The increase in water content stimulated his body to secrete lethal amounts of aldosterone. B. His electrolytes became incredibly diluted, causing water to rush into cells and make them burst. C. The concentration of sodium in his body tripled and caused his nervous system to stop working. D. He consumed an amount of water that his body could not use. His body responded by trying to get rid of some of the water through respiratory perspiration, and he drowned.
A very good sprinter is likely to have
A) average muscles; performance is based solely on training. B) more intermediate fibers than average. C) more fast twitch fibers than average. D) more slow twitch fibers than average. E) None of the answers are correct.
________ are antibodies found in body fluids.
Fill in the blank(s) with the appropriate word(s).
The hair cells that detect sound vibrations lie on the ________ membrane
A) basilar B) tectorial C) tympanic D) vestibular