Question

Assertion (A): Aquaporins are water permeable channels


Reason (R): Aquaporins allow water to move across the epithelial cells in relation to the

osmotic different from the lumen to the interstitial fluid .


a) (R) is correct but (A) is wrong
b) (A) is correct and (R)explains
(A)

c) (A) is correct but (R) is wrong d) Both (A) and (R) are wrong​

Answer 1

Answer:

C

Explanation:

A is correct

Also known as water channels, aquaporins are integral membrane pore proteins. Some of them, known as aquaglyceroporins, also transport other small uncharged dissolved molecules including ammonia, CO2, glycerol, and urea. ... The presence of water channels increases membrane permeability to water.

R is wrong

Aquaporins are found in a high concentration in the epithelial cells that produce aqueous humor (as well as other epithelial cells that allow water to move readily across their membrane, e.g., epithelial cells in the kidney). These pores allow water molecules through in a single file.