Answer:
The correct answer is a glucose.
Explanation:
Proximal convulated tubule is an important part of the nephron of kidney.proximal convoluted tubule helps in the the reabsorption of Na+ from the glomerular filtrate along the transport of glucose from the later.This type of transport is called co transport process.
The co transport process is mediated by Na+ glucose symporter protein which uses the secondary active transport mechanism to facilitate the re absorption of Na+ along with glucose.
