Diabetes insipidus occurs due to the hyposecretion of

Options

A. Thymosine
B. Oxytocine
C. Insulin
D. Vasopressin

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the condition known as diabetes insipidus and the hormone whose hyposecretion leads to this condition.

2. **Defining Hyposecretion**: Hyposecretion refers to the condition where a hormone is produced in insufficient amounts. This leads to various physiological issues depending on the hormone involved.

3. **Identifying the Relevant Hormone**: In the case of diabetes insipidus, the hormone that is hyposecreted is the Antidiuretic Hormone (ADH), also known as vasopressin.

4. **Understanding the Role of ADH**: ADH plays a crucial role in regulating water balance in the body. It helps the kidneys manage the amount of water in the body by controlling the reabsorption of water in the renal tubules.

5. **Consequences of ADH Hyposecretion**: When there is a deficiency of ADH (hyposecretion), the kidneys fail to reabsorb water effectively, leading to excessive urination and dehydration, which are characteristic symptoms of diabetes insipidus.

6. **Eliminating Incorrect Options**: Other hormones mentioned (thymosin, oxytocin, and insulin) do not cause diabetes insipidus. Thus, they can be ruled out as answers to the question.

7. **Conclusion**: Therefore, the correct answer to the question is that diabetes insipidus occurs due to the hyposecretion of vasopressin (ADH).

### Final Answer:
Diabetes insipidus occurs due to the hyposecretion of vasopressin (ADH).

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