Question

Assertion (A): The basic filtration unit in the kidneys, like in the lungs, is a cluster of very thin-walled blood capillaries. 

Reason (R): Each capillary cluster in the kidney is associated with the cup-shaped end of a coiled tube called Bowman’s capsule.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

• Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).

Explanation:

The kidney’s basic filtration unit is the glomerulus, a cluster of thin-walled capillaries, similar to the capillary network in the lungs. Bowman’s capsule surrounds this capillary cluster, but it does not explain why capillaries act as the filtration unit.