Same chapter3 marksDifficulty: Medium
Explain the counter-current mechanism in the kidney.
Excretory Products and their Elimination
3 marksDifficulty: Medium
Name the hormones that regulate kidney function and state what each does.
Original Khojo Papers practice question — not from a past board paper.
Answer
Antidiuretic hormone from the posterior pituitary increases the reabsorption of water from the collecting duct, so less urine is passed. Aldosterone from the adrenal cortex increases the reabsorption of sodium and water in the distal tubule. Atrial natriuretic factor, released when the atria are stretched, causes vasodilation and reduces blood pressure.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The renin-angiotensin system is the third arm of this regulation.
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