71. Angiotensin functions to a.increase blood pressure b.stimulate antidiuretic

Question

71. Angiotensin functions to
a.increase blood pressure
b.stimulate antidiuretic hormone secretion
c.both a and b
d.neither a nor b

72. Over which of following ranges of mean arterial pressure does renal glomerular filtration rate remain fairly stable due to intrinsic regulation?
a.80 -160 mmHg
b.80 -100 mmHg
c.100 -120 mmHg
d.140 -160 mmHg

73. Antidiuretic hormone aquaporin in the ______
a.closes; proximal tubules
b.opens: proximal tubules
c.opens; loop of Henle
d.opens; collecting duct

74. The renal distal tubule reabsorbs ___% filtrated proteins.
a.l0
b.50
c.O
d.l00

75. The water reabsorption from the collecting duct depends on the
a.active transport mechanism
b.osmotic force
c.both a and b
d.neither a nor b

Explanation / Answer

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71. Angiotensin functions to
c. Both a and c

In fact, the renin-angiotensin system is well known. In addition to constricting blood vessels, it increases secretion of hormones like aldosterone that itself increases reabsorption of sodium and water.


72. Over which of following ranges of mean arterial pressure does renal glomerular filtration rate remain fairly stable due to intrinsic regulation?
a. 80 - 160 mmHg


73. Antidiuretic hormone aquaporin in the
d. opens; collecting duct

The opened channel aquaporin helps water reabsorption.


74. The renal distal tubule reabsorbs ___% filtrated proteins.
c. ZERO

The tubules reabsorb K+, Na+, Ca+2 and regulate pH. All very small electrolytes... not macromolecules like proteins.


75. The water reabsorption from the collecting duct depends on the
a. active transport mechanisms

See question 73 above..... The collecting duct is "largely impermeable to water without the presence of antidiuretic hormones."

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