The energy for muscle contraction is provided by
A. adenosine diphosphate (ADP).
B. adenosine triphosphate (ATP).
C. Na/K pumps.
D. actin.
Answer: B
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Indicate whether the statement is true or false
A group of scientists designed a clinical study to investigate the effects of cholesterol deficiency in humans. For the duration of the 8-week study, the adult subjects must live in a special research unit of a hospital. The only food the subjects can consume is a man-made formula that contains all known nutrients, except cholesterol. Based on this information, you would expect
A. about 50% of the subjects to show signs and symptoms of a cholesterol deficiency within the first week of the study. B. none of the subjects to show signs and symptoms of a cholesterol deficiency during the entire study. C. about 20% of the subjects to show signs and symptoms of a cholesterol deficiency within the first week of participating in the study. D. 100% of the subjects to show signs and symptoms of cholesterol deficiency within the first 3 weeks of participating in the study.
Which of the following situations is/are life threatening?
A. hypokalemia B. hyperkalemia C. hypokalemia and hyperkalemia D. neither hypokalemia nor hyperkalemia
Last night, Sara ate French fries, fried fish, and creamy cole slaw. For dessert, she had a chocolate milk shake. About an hour after eating this food, she suddenly complained of severe abdominal pain. Based on this information, Sara probably has
A. colitis. B. constipation. C. aneurysms. D. gallstones.