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Zoology-Endocrine Glands

NEET Zoology Endocrine Glands MCQ Question

Type: MCQ-numerical-Easy-Class 11

If the parathyroid glands secrete parathyroid hormone at a constant rate, and this hormone is responsible for regulating calcium levels by increasing them in the blood, what would be the effect on blood calcium levels if the secretion of parathyroid hormone is reduced by 50%?

A

Blood calcium levels decrease

B

Blood calcium levels increase

C

Blood calcium levels remain constant

D

Blood calcium levels fluctuate

Correct Answer

Option A

Detailed Explanation

Parathyroid hormone increases calcium levels in the blood. If its secretion is reduced, calcium levels will decrease.

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