Trophic hormones are produced by

Options

A. Anterior pituitary
B. Middle pituitary
C. Posterior pituitary
D. Thyroid.

Answer

**Step-by-Step Solution:**

1. **Understanding Trophic Hormones**: Trophic hormones are hormones that stimulate other endocrine glands to release their hormones. Their primary function is to regulate the activity of other glands rather than directly affecting target tissues.

2. **Identifying the Source**: The question asks where trophic hormones are produced. The options given are anterior pituitary, middle pituitary, posterior pituitary, and thyroid.

3. **Analyzing Each Option**:
- **Anterior Pituitary**: This gland produces several trophic hormones, such as Thyroid Stimulating Hormone (TSH), Adrenocorticotropic Hormone (ACTH), and Follicle Stimulating Hormone (FSH). These hormones act on other endocrine glands.
- **Middle Pituitary**: This gland is not commonly recognized in human anatomy and primarily secretes melatonin, which does not fit the definition of trophic hormones.
- **Posterior Pituitary**: This gland releases hormones like oxytocin and vasopressin, which have direct effects on target organs and do not stimulate other glands.
- **Thyroid**: The thyroid gland produces hormones like thyroxine (T3 and T4) that regulate metabolism but does not produce trophic hormones.

4. **Conclusion**: Based on the analysis, the anterior pituitary is the correct answer as it is responsible for producing trophic hormones that stimulate other endocrine glands.

5. **Final Answer**: Trophic hormones are produced by the **anterior pituitary**.

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