Sperm motility occur due to activation of the sperm by the viscous liquid. The liquid is secreted by-

Options

A. Secretory cells of the epithelial lining of genital tract
B. Sperm itself
C. Egg cell
D. Connective tissue of uterus

Answer

To solve the question regarding the activation of sperm motility by a viscous liquid, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sperm Motility**:
- Sperm motility refers to the ability of sperm to move efficiently. This is crucial for fertilization, as sperm must travel to reach and fertilize the egg.

2. **Identifying the Source of Activation**:
- The question asks about the viscous liquid that activates sperm motility. We need to analyze the options provided:
- Secretory cells of epithelial lining of the genital tract
- Sperm itself
- Egg cell
- Connective tissue of the uterus

3. **Evaluating Each Option**:
- **Sperm itself**: Sperm do not secrete any liquid; they rely on external factors for activation.
- **Egg cell**: While the egg is crucial for fertilization, it does not secrete a liquid that activates sperm motility.
- **Connective tissue of the uterus**: This tissue does not play a role in secreting a liquid that activates sperm.
- **Secretory cells of the epithelial lining of the genital tract**: These cells secrete a viscous liquid that helps in the activation of sperm motility when sperm reach the female reproductive tract.

4. **Conclusion**:
- The correct answer is that the viscous liquid activating sperm motility is secreted by the secretory cells of the epithelial lining of the genital tract.

### Final Answer:
The viscous liquid that activates sperm motility is secreted by the secretory cells of the epithelial lining of the genital tract.

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