Question

Which of the following statement is correct about renal tubules as a countercurrent multiplier system?

a. A countercurrent multiplier does not require energy.

b. A countercurrent multiplier system is as efficient as a concurrent or crosscurrent multiplier system.

c. A countercurrent multiplier maintains solute concentration gradient throughout the entire length of the system.

d. A countercurrent multiplier diminishes solute concentration gradient throughout the entire length of the system.

e. A countercurrent multiplier loses solute concentration gradient half way through the system.

Answer 1

Answer- E A countercurrent multiplier loses solute conceni gradient half way through the system.

Explanation- the countercurrent multiplier formed by loop of henle and vasa recta are very beneficial in forming the concentrate urine.

Its uses energy to reabsorb the solute.

The descending limb of loof of henle is permeable to water but impermeable to solute while the ascending limb of loop of henle is permeable to solute but bot water and thus it maintains an osmotic gradient and form concentrated urine.