Question

1. The site and principal mechanism for the passage of glucose into the bloodstream in the human kidney is the (a) collecting duct, by active secretion. (b) distal convoluted tubule, by passive diffusion. (c) glomerulus, by selective reabsorption. (d) proximal convoluted tubule, by selective reabsorption

Answer 1

The site and the principal mechanism for the passage of glucose into the bloodstream in the human kidney is the proximal convoluted tubule, by selective reabsorption.

• Tubular reabsorption is a process by which solutes and water moves out of the filtrate and back to the bloodstream.
• This process of reabsorption ensures homeostasis within the human body.

• Almost 180g/day of glucose is filtered by the renal glomerulus and is reabsorbed by the proximal convoluted tubule.
• Apart from glucose, other molecules that are reabsorbed by proximal convoluted tubule are amino acids, urea, sodium, potassium, etc.

Answer 2

Answer:proximal convoluted tubule

Explanation: by selective reabsorption