Question

Assertion: Epithelium is well-suited for gas exchange in the lungs.

Reason: It consists of multiple layers of tall cells that slow down diffusion.

Options

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

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

• (A) is true, but (R) is false.

• (A) is false, but (R) is true.

Answer 1

(A) is true, but (R) is false.

Explanation:

The assertion is correct since the epithelium that lines the lungs is well-suited for gas exchange due to its single layer of thin, flat cells that allow for rapid gas diffusion.

The reason is incorrect since this epithelium is not made up of numerous layers of tall cells; if it were, the thickness would delay diffusion rather than promote it.