Which of the following statements is CORRECT?
A) Urea accumulation does not contribute to the medullary osmotic gradient.
B) All vertebrates can produce dilute urine but only mammals and birds produce urine more concentrated than blood.
C) The kidneys of desert mammals have a low medullary area and so produce highly concentrated urine.
D) Urine is concentrated by active removal of solutes as it passes along the collecting duct.
E) The kidneys of birds do not have loops of Henle to establish as osmotic concentration gradient in the medulla.
Correct Answer:
Verified
Q29: In the nephrons of mammals, which of
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Q31: The release of ADH
A) increases urine volume.
B)
Q32: The nephrons of vertebrates have many functions.
Q33: The loops of Henle
A) osmoconcentrate urine.
B) pass
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A) allows the recovery of Na+ and
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A) is inversely proportional to the
Q37: Which of the following is NOT essential
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