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 R.B.Cs formation. 

Choose the correct answer from the options given below:

Options

• B and C only

• C and D only

• D and E only

• A and D only

Answer 1

C and D only

Explanation:

The text explains that thyroid hormones do not manage the sleep-wake cycle or immune system growth. Instead, the pineal gland’s melatonin regulates sleep patterns, while immune development depends on specific cells and signalling molecules rather than thyroid activity.