In the nephron depicted above, what will happen if part b malfunctions so that substances can no longer diffuse in and out? a) water will not be reabsorbed through the collecting ducts. b) adh will not be released into the bloodstream. c) fluid from the blood will not enter the nephron. d) useful substances will not be reabsorbed from the urine.

(d). Useful substances will not be reabsorbed from the urine.

Explanation:

The part B in given image proximal convoluted tubule (PCT) of nephron. The PCT is part of nephrons, present in kidney which mainly function in re-absorption of useful substances, such as amino acids, glucose, water, and other nutrients from the filtered fluid to back to the blood.

So, if it becomes malfunction, the useful substances from fluid will not be reabsorbed from the urine.

Thus, the correct answer is option (d).

the answers are a and c