The Primary Function of the Proximal Convoluted Tubule Is

Question

The primary function of the proximal convoluted tubule is
A) filtration.
B) reabsorption of ions, organic molecules, vitamins, and water.
C) secretion of acids and ammonia.
D) secretion of drugs.
E) adjusting the urine pH.

Accepted Answer

The proximal convoluted tubule is responsible for reabsorbing ions, organic molecules, vitamins, and water from the filtrate back into the bloodstream. This is a crucial step in maintaining fluid and electrolyte balance in the body. The other functions listed (filtration, secretion of acids and ammonia, secretion of drugs, adjusting urine pH) are carried out by other parts of the nephron.