Melatonin delays puberty by opposing the action of

Options

A. MSH and progesterone
B. LH and FSH
C. TSH and MSH
D. Thrombin and relaxin

Answer

**Step-by-Step Solution:**

1. **Understanding Melatonin's Role**: Melatonin is a hormone secreted by the pineal gland. It is known to influence various biological rhythms and reproductive functions.

2. **Identifying the Hormones Involved in Puberty**: The key hormones responsible for initiating and regulating puberty are Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH). These hormones are classified as gonadotropins and play a crucial role in the development of the reproductive system.

3. **Melatonin's Effect on Gonadotropins**: During early childhood, melatonin levels are higher, and as puberty approaches, melatonin levels decrease. This decrease in melatonin is associated with the onset of puberty, as melatonin can inhibit the production of gonadotropins.

4. **Opposition to LH and FSH**: Melatonin delays the onset of puberty by opposing the actions of LH and FSH. By inhibiting these hormones, melatonin effectively delays the maturation of the reproductive system and the onset of secondary sexual characteristics.

5. **Conclusion**: Therefore, the correct answer to the question is that melatonin delays puberty by opposing the action of LH (Luteinizing Hormone) and FSH (Follicle Stimulating Hormone).

**Final Answer**: Melatonin delays puberty by opposing the action of LH and FSH.

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