Production, secretion, and ejection of milk requires the synergistic effects of prolactin and

Options

A. Estrogen
B. Progesterone
C. Oxytocin
D. All of these

Answer

To answer the question regarding the production, secretion, and ejection of milk requiring the synergistic effects of prolactin and another hormone, we can break down the information as follows:

### Step-by-Step Solution:

1. **Understanding Prolactin's Role**:
- Prolactin is a hormone produced by the anterior pituitary gland. Its primary function is to stimulate milk production in the mammary glands after childbirth.

2. **Identifying Other Hormones**:
- In addition to prolactin, other hormones play significant roles in the process of milk production and ejection. These hormones include estrogen, progesterone, and oxytocin.

3. **Role of Estrogen**:
- Estrogen is responsible for the development of mammary glands during pregnancy. It helps prepare the breast tissue for milk production but inhibits milk release during pregnancy.

4. **Role of Progesterone**:
- Progesterone also plays a crucial role during pregnancy. It helps maintain the pregnancy and, like estrogen, inhibits milk production until after childbirth.

5. **Role of Oxytocin**:
- Oxytocin is released during childbirth and is responsible for the contraction of the mammary gland muscles, which helps in the ejection of milk during breastfeeding.

6. **Synergistic Effect**:
- The combined actions of these hormones (prolactin, estrogen, progesterone, and oxytocin) are necessary for the proper production, secretion, and ejection of milk. This is why the question refers to their synergistic effects.

7. **Conclusion**:
- Therefore, the correct answer to the question is that the production, secretion, and ejection of milk require the synergistic effects of prolactin and all of the mentioned hormones (estrogen, progesterone, and oxytocin).

### Final Answer:
The production, secretion, and ejection of milk require the synergistic effects of prolactin and **all of these** (estrogen, progesterone, and oxytocin).

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