Unformatted text preview: 3. The reabsorption of water from the nephron depends primarily on the action of: carbonic anhydrase
\j electrical gradients D) transcellular water transporters
F.) carrier-mediated reabsorption of water 30. Which of the following statements about the Loop of Henle is TRUE?
A) The descending limb is impermeable to water. The descending limb is permeable to N30].
| (I @163 ascending limb is impermeable to water.
Th e ascending limb secretes NaCl into the lumen. E) The cortical nephrons have longer loops of Henle. 4.0. This is a difficult question — think carefully about the overall function of the kidney. If the highest osmolarity in the interstitium of the renal medulla is 1000 mOsm and the secretion of ADH is minimal, the osmol‘e will be about:
k ‘g . . E: ) 1000 mOsm
D) 1200 mOsm
E) 2000 mOsm 41. If a person quickly drinks a gallon ofwatcr, you expect the plasma osmolarity will initially
and then the secretion of ADH will A) increase; increase ecrease; decrease C increase; stay the same J] DSWD \QVlJf‘j L m stay the same; stay the same
E) decrease; increase 42. If the clearance of a large molecule (>6000 daitons) is greater than zero, but less than the GFR, you
know that the substance must be: hMHHﬁej Mtered creted bsorbed
egatively charged [ygﬂhnm 2', Lil—(above k €l£f£lrua —V(qb Waitively charged 43. In respiratory acidosis, there is an increase in the concentration of H+ in the blood leading to excretion of:
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- Spring '08