Question

The kidneys resemble the contractile vacuoles of amoeba in:

• A. expelling out excess of water
• B. expelling out glucose
• C. expelling out urea and uric acid
• D. expelling out salts

Answer 1

The correct option is A

expelling out excess of water

A contractile vacuole is a sub-cellular structure (organelle) involved in osmoregulation. Kidneys play a very large role in human osmoregulation by regulating the amount of water reabsorbed from glomerular filtrate in kidney tubules, which is controlled by hormones such as antidiuretic hormone (ADH), aldosterone, and angiotensin II.