Question

Hormone that stimulates the reabsorption of calcium ions by renal tubules and increases the absorption of Ca²⁺ from the gut.

• A. Parathormone
• B. Renin
• C. Angiotensin
• D. Vasopressin

Hint:

Understanding the role of parathormone can help in diagnosing and treating calcium imbalances and related bone diseases.

Answer 1

The Correct Option is A

The hormone responsible for stimulating the reabsorption of calcium ions (Ca²⁺) by renal tubules and increasing the absorption of calcium from the gut is Parathormone (also called Parathyroid Hormone or PTH).
Parathormone is secreted by the parathyroid glands. It plays a critical role in regulating calcium levels in the blood. PTH increases the reabsorption of calcium by the kidneys and enhances the absorption of calcium from the gastrointestinal tract.
Renin is involved in the regulation of blood pressure and sodium balance, but it does not directly affect calcium absorption.
Angiotensin is a hormone involved in regulating blood pressure and fluid balance, not in calcium metabolism.
Vasopressin (also known as antidiuretic hormone, ADH) regulates water reabsorption in the kidneys, but it does not affect calcium ion reabsorption or absorption from the gut.

Thus, the correct answer is Option (A), Parathormone.