Question

Hormone regulating calcium and phosphorus metabolism in the body is secreted by

• A. Thyroid
• B. Parathyroid
• C. Thymus
• D. Pancreas

Answer 1

Answer: (B)

Parathyroid

A. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.

B. Parathyroid gland is present in the form of four small pouches which are embedded in the posterior surface of lobes of thyroid gland. This gland secretes parathormone which increases calcium reabsorption from the bones and causes mobilisation of calcium in the blood. This hormone also regulates phosphate excretion through urine.

C. Thymus gland is associated with the development of immune system and present on the dorsal side of heart. It secretes thymosin hormone which plays an important role in the differentiation of T-lymphocytes.

D. Pancreas is a heterocrine gland as it acts both as endocrine and exocrine gland. It secretes insulin hormone into blood and act as endocrine gland and when it secretes digestive enzymes and juice through pancreatic duct, it acts as exocrine gland.

Hence, hormone regulating calcium and phosphorus metabolism in the body.

So, the correct answer is 'Parathyroid'.