Question

Which of the following are NOT under the control of thyroid hormone?

1. Maintenance of water and electrolyte balance
2. Regulation of basal metabolic rate
3. Normal rhythm of sleep-wake cycle
4. Development of immune system
5. Support the process of RBCs formation

Choose the correct answer from the options given below:

• A. B and C only
• B. C and D only
• C. D and E only
• D. A and D only

Answer 1

The Correct Option is B

C. Normal rhythm of sleep-wake cycle 

• The sleep-wake cycle is primarily regulated by the hormone melatonin, which is produced by the pineal gland, not the thyroid gland.

D. Development of immune system

• The development and regulation of the immune system involve various factors, including immune cells, cytokines, and other immune-related molecules. The thyroid hormone itself does not have a direct role in the development of the immune system.

The other options are partially or directly influenced by thyroid hormone:

A. Maintenance of water and electrolyte balance

• Thyroid hormone can influence water and electrolyte balance by affecting kidney function and electrolyte transport.

B. Regulation of basal metabolic rate

• Thyroid hormone plays a significant role in regulating the basal metabolic rate (BMR) of the body.

E. Support the process of R.B.Cs formation

• Thyroid hormone is involved in erythropoiesis, the process of red blood cell formation. It affects the production and maturation of red blood cells in the bone marrow.

The correct option is (B): C and D only