The citric acid cycle begins by combining
A. oxaloacetic acid and acetyl-CoA to form citric acid.
B. pyruvate and acetic acid to form acetoacetic acid.
C. carbon dioxide and water to form carbonic acid.
D. pyruvate and citric acid.
E. pyruvate and carbon dioxide to form lactate.
Answer: A
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Which statement is not true of nerves that supply the kidney?
A. They consist mostly of parasympathetic fibers. B. Fibers originate in the superior mesenteric ganglion. C. They function to regulate blood flow into and out of the glomerulus. D. They stimulate renin secretion. E. They consist mostly of sympathetic fibers.
Which of the following is NOT a characteristic commonly used to name skeletal muscles?
a) Size b) Shape c) Number of origins d) Sites of origins e) Thickness of fibers
A drug that inhibited acetylcholinesterase would result in
A. a failure to stimulate the muscle due to decreased ACh release. B. enhanced stimulation of the muscle due to decreased ACh breakdown. C. enhanced stimulation of the muscle due to enhanced ACh release. D. poor muscle stimulation due to enhanced ACh breakdown.
In the absence of the enzyme carbonic anhydrase, the combination of water and carbon dioxide to form carbonic acid does not occur
Indicate whether this statement is true or false.