Sympathetic stimulation of the kidney can do all of the following, EXCEPT:
A) constrict both the afferent and efferent arterioles.
B) increase renin secretion.
C) increase blood concentration of angiotensin-II (A-II).
D) lower blood volume and blood pressure.
Answer: D
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A) Endorphins B) Serotonin C) Epinephrine D) Acetylcholine
Dehydration may cause some ions to become concentrated. If a person was suffering from severe hyperkalemia, you would expect
A) the membrane potential of nerves and muscles to be more negative. B) the potassium ion concentration of the interstitial fluid to be less than normal. C) the skeletal muscles to be unresponsive and cardiac arrest could occur. D) muscle weakness and increased strength of twitch contractions. E) All of the answers are correct.
A lack of vitamin C in the diet results in which of the following?
A. Abnormally loose collagen fibers, loose joints, and stretchy skin B. A mutation in the gene for collagen C. Decreased production of the amino acids proline and lysine leading to weak collagen D. Atrophy of skeletal muscle tissue E. A mutation in the gene for elastin
The ________ is a region of dense bone that surrounds and protects the membranous labyrinth
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