Select the false statement

Options

A. `T_(4)` is the chief circulating form of thyroid hormone, but is less active than `T_(3)`
B. Acromegaly is usually associated with hypoglycemia and hypotension
C. Thyroxine promotes the body growth and metamorphosis is amphibia
D. Hypothalamus produces the hormone concerned with milk ejaculation

Answer

To determine the false statement regarding hormones, we will analyze each statement provided in the question step by step.

### Step-by-Step Solution:

1. **Statement Analysis**: The first statement claims that T4 is the chief circulating form of the thyroid hormone but is less active than T3.
- **Evaluation**: This statement is true. T4 (thyroxine) is indeed the primary form of thyroid hormone in circulation, but T3 (triiodothyronine) is more potent and active than T4.

2. **Statement Analysis**: The second statement states that acromegaly is usually associated with hypoglycemia and hypotension.
- **Evaluation**: This statement is false. Acromegaly is caused by excess growth hormone, which typically leads to hyperglycemia (high blood sugar) rather than hypoglycemia (low blood sugar). Additionally, individuals with acromegaly may experience hypertension (high blood pressure), not hypotension.

3. **Statement Analysis**: The third statement mentions that thyroxine promotes body growth and metamorphosis in amphibians.
- **Evaluation**: This statement is true. Thyroxine is known to promote growth and metamorphosis in amphibians, such as the transformation from tadpole to frog.

4. **Statement Analysis**: The fourth statement asserts that the hypothalamus produces the hormone concerned with milk ejaculation.
- **Evaluation**: This statement is true. The hypothalamus produces oxytocin, which is involved in milk ejection during breastfeeding. Although oxytocin is stored in the posterior pituitary, it is produced in the hypothalamus.

### Conclusion:
The false statement among the options provided is the second one, which incorrectly associates acromegaly with hypoglycemia and hypotension.

### Final Answer:
The false statement is: "Acromegaly is usually associated with hypoglycemia and hypotension."

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