What happened to the urine volume when the solute gradient in the interstitial space was increased?
a. the urine volume stayed the same.
b. the urine volume decreased.
c. the urine volume increased.
d. the urine volume went to zero.

The correct answer is b. the urine volume decreased.

Explanation:

As the solute gradient increases in the interstitial space the concentration of of solute increases in the fluid which draws out water present in the nephron tubules by osmosis in the interstitial fluid which is then reabsorbed by the body. So as the water comes out from filtrate the urine volume will decrease.

This process is helpful in reabsorbing the water and making the urine concentrated. Water reabsorption is necessary  to maintain the volume of the blood present in the body. So increased solute gradient in interstitial space helps to convert isotonic filtrate to hypertonic urine.

this doesn't seem to be an actual health/school question. yet, im gonna answer it as if it is one. (by the way, im here for you if it isnt).

humans are very odd creatures. yet, this question is very biased against males. all genders do happen to cheat on their wives / husbands. the real question should be why genders cheat on the person they love. some people might make bad choices, or just make a mistake

explanation: