Which of the answer choices does not occur when the antidiuretic hormone (ADH) is present?
a. Aquaporins insert in the membrane of the collecting duct cells.
b. The urine in the collecting duct becomes more concentrated.
c. The collecting duct walls become permeable to water.
d. Water diffuses into the collecting duct from the interstitial fluid.
e. All of these answers choices are correct.

D

Explanation:

Rather water diffuses from the collecting duct into the interstitial fluids, through the aquaporins. The fusion of the aquaporins with the membrane lining of the collecting duct ( due to  synthesis  of  the ADH by the hypothalamic neurone and and it releases  into the blood from the post. pituitary gland) increases the permeability of the collecting  duct to water. Therefore water moves  into the interstitial fluids from the collecting duct by osmosis, leading to production of   more concentrated urine is produced .

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