Assertion: Tubular secretion removes foreign bodies ions and molecules from the body.
Reason: As much as 99 per cent of the material in the filtrate is reabsorbed from the body because of tubular secretion.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. if both assertion and reason are true but reason is not the correct explanation of assertion.
C. if assertion is true but reason is false
D. if both assertion and reason are false.

Answer

C

Explanation

Certain chemicals in the blood that are not removed by filtration from the glomerular capillaries are removed by a third process of urine formation called tubular secretion. These chemicals are removed from the blood in the peritubular capillaries to the nephron tubule by both passive and active transports. The chemicals removed by tubular secretion include foreign bodies and ions and molecules thata are toxic at elevated levels.