Question

Assertion (A): Glucose, Na⁺ and amino acids are absorbed actively.

Reason (R): Na⁺, glucose and amino acids move against the concentration gradient and hence require energy.

विकल्प

• 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

Both A and R are true and R is the correct explanation of A.

Explanation:

The assertion is true because essential nutrients like glucose, amino acids, and sodium ions (Na⁺) are absorbed into the blood via active transport in the small intestine. The reason is also true and provides the correct explanation because active transport specifically refers to the movement of substances against their concentration gradient (from low to high concentration). Since this uphill movement cannot occur spontaneously, it directly requires the expenditure of cellular metabolic energy (ATP).