Which of the following matches is not true for the hormone and their functions ?

Options

A. Thyroxine , maintenance of water and electrolyte balance
B. Cortisol : stimulate the formation of erythrocytes
C. Melatonin : influences pigmentation and menstural cycle
D. All of the above are corrctly matched.

Answer

To solve the question regarding which hormone and function match is not true, we will analyze each option step by step.

### Step 1: Analyze Option 1
- **Hormone**: Thyroxine
- **Function**: Maintains the balance of water and electrolyte.

**Analysis**: Thyroxine is a hormone produced by the thyroid gland. It plays a crucial role in regulating metabolism and maintaining the basal metabolic rate. While it does have an indirect effect on water and electrolyte balance through metabolic processes, it is primarily known for regulating metabolism rather than directly maintaining water and electrolyte balance.

**Conclusion**: This option is somewhat misleading, but it is generally accepted that thyroxine does play a role in maintaining metabolic processes that can affect water and electrolyte balance.

### Step 2: Analyze Option 2
- **Hormone**: Cortisol
- **Function**: Stimulates the formation of erythrocytes (red blood cells).

**Analysis**: Cortisol is a glucocorticoid hormone released by the adrenal glands. It is known to stimulate erythropoiesis, especially during stress conditions. This means it does indeed promote the formation of red blood cells, making this match correct.

**Conclusion**: This option is correctly matched.

### Step 3: Analyze Option 3
- **Hormone**: Melatonin
- **Function**: Influences pigmentation and the menstrual cycle.

**Analysis**: Melatonin is a hormone produced by the pineal gland and is primarily known for regulating sleep-wake cycles. However, it also has roles in influencing pigmentation and can affect the menstrual cycle. Therefore, this match is also correct.

**Conclusion**: This option is correctly matched.

### Step 4: Analyze Option 4
- **Statement**: All the above are correctly matched.

**Analysis**: Since we have established that options 1, 2, and 3 are correctly matched, this statement is also true.

### Final Conclusion
After analyzing all the options, we find that all the hormone-function pairs are correctly matched. Therefore, the answer to the question "Which of the following matches is not true for the hormone and their functions?" is:

**Answer**: None of the options are incorrect; all are correctly matched.