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): Release of ADH from the neurohypophysis prevents diuresis by facilitating water reabsorption from the latter parts of the tubule. Reason (R): An excessive loss of fluid from the body switches off the osmoreceptors, which stimulates the hypothalamus to release ADH. In the light of the above statemen
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- B(A) is correct but (R) is not correct
- CBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- D(A) is not correct but (R) is correct
Correct answer
B. (A) is correct but (R) is not correct
Step-by-step solution
Assertion (A) is a correct statement. Antidiuretic hormone (ADH) or vasopressin is released from the neurohypophysis and facilitates water reabsorption from the latter parts of the renal tubule, thereby preventing diuresis. Reason (R) is an incorrect statement. An excessive loss of fluid from the body activates (switches on) the osmoreceptors, which then stimulate the hypothalamus to release ADH. Osmoreceptors are switched off when there is an increase in body fluid volume, which suppresses ADH release to complete