Question:
Calcitonin is secreted by:
Calcitonin is secreted by:
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Calcitonin: from thyroid (C cells).
Lowers blood calcium.
Opposes PTH (parathyroid hormone).
Lowers blood calcium.
Opposes PTH (parathyroid hormone).
Updated On: Aug 18, 2026
- Kidney
- Adrenal Cortex
- Bones
- Thyroid gland
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Calcitonin is a hormone.
It is involved in calcium metabolism.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the source of calcitonin.
Step 3: Detailed Explanation:
Calcitonin is secreted by the parafollicular cells (C cells) of the thyroid gland.
It lowers blood calcium levels.
Parathyroid hormone (PTH) has the opposite effect.
Thus, calcitonin is secreted by the thyroid gland.
Step 4: Final Answer:
Calcitonin is secreted by the thyroid gland.
Hence, the correct option is (D).
Calcitonin is a hormone.
It is involved in calcium metabolism.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the source of calcitonin.
Step 3: Detailed Explanation:
Calcitonin is secreted by the parafollicular cells (C cells) of the thyroid gland.
It lowers blood calcium levels.
Parathyroid hormone (PTH) has the opposite effect.
Thus, calcitonin is secreted by the thyroid gland.
Step 4: Final Answer:
Calcitonin is secreted by the thyroid gland.
Hence, the correct option is (D).
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