Mammalian prolactin is secreted by

Options

A. adenohypophysis
B. neurohypophysis
C. adrenal cortex
D. adrenal medulla

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where mammalian prolactin is secreted from. This requires knowledge of the endocrine system, specifically the glands involved in hormone secretion.

2. **Identifying the Glands**: The options given are adenohypophysis, neurohypophysis, adrenal cortex, and adrenal medulla. We need to identify which of these glands is responsible for secreting prolactin.

3. **Defining the Pituitary Gland**: The pituitary gland is divided into two main parts: the adenohypophysis (anterior pituitary) and the neurohypophysis (posterior pituitary).

4. **Function of Adenohypophysis**: The adenohypophysis is known for secreting various hormones including growth hormone, thyroid-stimulating hormone, and prolactin. It is primarily responsible for the secretion of hormones that regulate growth and metabolism.

5. **Function of Neurohypophysis**: The neurohypophysis does not secrete prolactin; it primarily releases hormones like oxytocin and vasopressin (ADH) that are produced in the hypothalamus.

6. **Excluding Other Options**: The adrenal cortex and adrenal medulla are parts of the adrenal glands and are not involved in the secretion of prolactin. Therefore, these options can be eliminated.

7. **Conclusion**: Based on the information gathered, mammalian prolactin is secreted by the adenohypophysis (anterior pituitary).

**Final Answer**: Mammalian prolactin is secreted by the adenohypophysis.

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