Question

During dehydration, the body attempts to conserve as much water as possible. Which of the following actions would NOT occur if the body is undergoing dehydration?
(a) Extracellalar fluids become more and more concentrated due to loss of water
(b) The posterior pituitary gland releases ADH which travels to the kidneys
(c) Renal tubules decrease water reabsorption
(d) The distal convoluted tubule and the collecting ducts become more permeable to water.

Answer 1

Answer:

The correct answer will be option- C.

Explanation:

Dehydration is the loss of water from the body in the response to which body undergoes physiological and metabolic changes as:

1. The hypothalamus produces Anti-diuretic hormone or ADH from the posterior of the pituitary gland which produces its effect on the kidney to reabsorb the water.

2. The body produces renin, angiotensin II and aldosterone which increases the permeability of the distal convoluted tubule and the collecting ducts.

3. The extracellular blood or the blood becomes more concentrated due to dehydration.

Thus, option- C which is that renal tubules decrease water reabsorption is the incorrect option as water absorption is increased in the kidney.