Q4. Assertion: ADH helps prevent diuresis. Reason: ADH facilitates water reabsorption from the latter parts of the tubule. Are both true, and does the reason explain the assertion?
Both are true, and the reason explains the assertion (NCERT page 212).
Q5. Name the condition caused by an impairment in the synthesis or release of ADH.
Diabetes insipidus: the kidney is less able to conserve water, causing water loss and dehydration (NCERT Chapter 19, page 242).
Q6. Which ions, besides Na, does aldosterone act on at the renal tubules, according to NCERT Chapter 19?
It stimulates the excretion of K and phosphate ions (NCERT page 245).