Name the gland(s) that contribute to human seminal plasma.

Options

A. prostate gland
B. bulbourethral gland
C. seminal vesicle
D. all of these

Answer

To answer the question regarding the glands that contribute to human seminal plasma, we can break down the information step by step:

### Step-by-Step Solution:

1. **Identify the Components of Seminal Plasma**:
- Seminal plasma is the fluid that carries sperm during ejaculation. It contains various nutrients and substances that support sperm health and mobility.

2. **List the Glands Involved**:
- The glands that contribute to human seminal plasma include:
- **Seminal Vesicles**: These glands produce a significant portion of the seminal fluid, including fructose, proteins, and mucus, which provide energy and nourishment to the sperm.
- **Prostate Gland**: This gland contributes citric acid and alkaline fluids to the seminal plasma, which help to maintain the pH balance and provide additional nutrients.
- **Bulbourethral Glands (Cowper's Glands)**: These glands secrete a pre-ejaculatory fluid that helps to lubricate the urethra and neutralize any acidity in the urethra and vagina, facilitating the passage of sperm.

3. **Conclusion**:
- Therefore, the glands that contribute to human seminal plasma are the **seminal vesicles, prostate gland, and bulbourethral glands**. Collectively, these glands ensure that the seminal plasma is rich in nutrients and suitable for sperm transport.

### Final Answer:
The glands that contribute to human seminal plasma are the **seminal vesicles, prostate gland, and bulbourethral glands**.

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