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All of the following functions are attributed to ADH except

REGULATION OF KIDNEY FUNCTION
NEET
1

A and B

2

C and D

3

B and C

4

A and D

Solution:

ADH (Antidiuretic Hormone), also known as vasopressin, primarily regulates water balance in the body.

Let's analyze each statement:

  • A. Increase in glomerular blood flow: ADH causes vasoconstriction, which increases systemic blood pressure. This can indirectly lead to an increase in glomerular blood flow to maintain filtration, although its direct effect on renal arterioles can be complex.

  • B. Promoting diuresis: Diuresis refers to increased urine production. ADH is an antidiuretic hormone, meaning it reduces urine output by increasing water reabsorption in the kidneys. Therefore, promoting diuresis is not a function of ADH.

  • C. Decrease in blood pressure: ADH is also called vasopressin because it causes vasoconstriction (narrowing of blood vessels), which leads to an increase in blood pressure. Therefore, decreasing blood pressure is not a function of ADH.

  • D. Increase in body fluid volume: By increasing water reabsorption from the renal tubules, ADH helps to conserve water and thus increases the body's fluid volume. This is a direct function of ADH.

The question asks for functions except those attributed to ADH. Based on the analysis, promoting diuresis (B) and decreasing blood pressure (C) are clearly not functions of ADH. Therefore, options B and C are the correct exceptions.

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