Question

Which of the following is not true about the thyroid gland and thyroid hormone?

• A. Deficiency of iodine in our diet results in hypothyroidism and enlargement of the thyroid gland, commonly called goitre.
• B. Thyroid hormone plays a major role in the differentiation of T lymphocytes.
• C. The thyroid gland also secretes a protein hormone called thyrocalcitonin (TCT) which regulates blood calcium levels.
• D. Maintenance of water and electrolyte balance is also influenced by thyroid hormones.

Answer 1

The correct option is B Thyroid hormone plays a major role in the differentiation of T lymphocytes.

The deficiency of iodine in our diet results in hypothyroidism and enlargement of the thyroid gland, commonly called goitre.

The thyroid gland secretes a hormone called thyrocalcitonin (TCT) which, along with parathyroid hormone, regulates blood calcium levels.

The thyroid hormone is also involved in maintaining the water and electrolyte balance in the body.

The thymus gland is responsible for the differentiation of T-lymphocytes, which provide cell-mediated immunity.