The secretion and ejection of milk by mammary gland require the synergistic effect of which of the following hormones?

Options

A. Estrogen, progesterone
B. Prolactin, oxytocin
C. Adrenaline, noradrenaline
D. Both (1) & (2)

Answer

To solve the question regarding the hormones involved in the secretion and ejection of milk by the mammary glands, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which hormones work together (synergistically) to facilitate both the secretion and ejection of milk from the mammary glands.

2. **Identify Key Processes**:
- **Secretion of Milk**: This process primarily involves the hormone **prolactin**. Prolactin is responsible for stimulating the mammary glands to produce milk after childbirth.
- **Ejection of Milk**: The ejection of milk occurs through the contraction of the muscles surrounding the mammary glands, which is stimulated by the hormone **oxytocin**. Oxytocin causes the milk to be released from the alveoli into the ducts.

3. **Evaluate the Options**:
- **Option 1**: Oestrogen and Progesterone - These hormones play roles in pregnancy and the development of mammary tissue but are not directly involved in the secretion and ejection of milk.
- **Option 2**: Prolactin and Oxytocin - This option includes both hormones responsible for the secretion and ejection of milk, making it a strong candidate.
- **Option 3**: Adrenaline and Noradrenaline - These are stress hormones and do not play a role in milk secretion or ejection.
- **Option 4**: Both 1 and 2 - Since option 1 is incorrect, this option cannot be correct.

4. **Conclusion**: Based on the analysis, the correct answer is **Option 2: Prolactin and Oxytocin**. These hormones work together to ensure both the secretion and ejection of milk from the mammary glands.