Which of the following controls the level of excretion of water and salt by kidney?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Mineralocorticoids
The adrenal cortex releases steroid hormones. Of these, the mineralocorticoids (for example aldosterone) control the excretion of water and salt by the kidney.
So the excretion of water and salt by the kidney is controlled by the mineralocorticoids.
NCERT (2026-27 edition):
Hormones – “… Steroid hormones are produced by adrenal cortex and gonads (testes in males and ovaries in females). Hormones released by the adrenal cortex play very important role in the functions of the body. For example, glucocorticoids control the carbohydrate metabolism, modulate inflammatory reactions, and are involved in reactions to stress. The mineralocorticoids control the level of excretion of water and salt by the kidney.”