Question

Maintenance of water and electrolyte balance is influenced by which hormone?

• A. Thymosin
• B. Calcitonin
• C. Testosterone
• D. Thyroid hormones

Hint:

Thyroid hormones regulate overall metabolism → affects water-electrolyte balance.

Answer 1

The Correct Option is D

The question wants the hormone most linked to keeping water and electrolyte levels steady in the body. Let's check what each hormone listed is actually known for.

1. Thymosin: released by the thymus gland, it helps T-lymphocytes mature for immune defense. It has no direct link to fluid or electrolyte balance.
2. Calcitonin: released by the thyroid's C cells, it lowers blood calcium by pushing calcium into bone. This is calcium regulation, not general water-electrolyte balance.
3. Testosterone: the main male sex hormone, it drives sperm formation and male secondary characters. It plays no direct role in fluid balance.
4. Thyroid hormones: T3 and T4 set the overall metabolic rate of the body. Because so many transport pumps and ion channels in cells depend on metabolic energy, the pace at which thyroid hormones run metabolism also shapes how well the body keeps its water and electrolyte levels steady.

Of the four, only thyroid hormones have this broad metabolic link that ties into fluid and electrolyte regulation.

Let's summarize:

• Thymosin: immunity. Calcitonin: calcium. Testosterone: male reproductive traits.
• Thyroid hormones set metabolic rate, which indirectly supports water-electrolyte balance.

So the answer is thyroid hormones, option (4).