Question

When osmolarity increases in the plasma, the homeostatic response is

A) decreased thirst

B) increased respiration

C) decreased aldosterone release from the adrenal cortex.

D) decreased reabsorption of sodium, potassium and chloride from the lumen of the loops of Henle.

Answer 1

When osmolarity increases in the plasma,the homeostatic response is decreased reabsorbtion of sodium,potassium and chloride from lumen of loops of Henle.

.Osmolarity increases due to dehydration.Increase in osmolarity of plasma stimulates secretion of Anti Diuretic Hormone(ADH).It will increase water reabsorption.Also decreased reabsorption of sodium,potassium and chloride from the lumen of loops of Henle will make the urine more concentrated and hence the blood plasma will be less concentrated.Hence its osmolarity will decrease and come to normal level.

So the correct answer is option D.