NEETZoologyExcretory Products and their Elimination
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): An increase in body fluid volume switches off the osmoreceptors and suppresses the release of ADH. Reason (R): ADH facilitates water reabsorption from the latter parts of the tubule, preventing diuresis. In the light of the above statements, choose the correct answer from the options given below:
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is true. According to NCERT, an increase in body fluid volume can switch off the osmoreceptors and suppress the ADH release to complete the feedback. Reason (R) is also true. ADH (Antidiuretic Hormone) facilitates water reabsorption from the latter parts of the tubule (DCT and collecting duct), thereby preventing diuresis. The Reason correctly explains the Assertion because the suppression of ADH is necessary precisely because its function is to conserve water. When body fluid volume is already high,