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

**Step-by-Step Solution:**

1. **Understanding Sperm Motility**: Sperm motility refers to the ability of sperm to move effectively. This movement is crucial for fertilization as sperm must travel through the female reproductive tract to reach the egg.

2. **Role of Viscous Liquid**: The activation of sperm motility is facilitated by a viscous liquid. This liquid provides a medium that supports sperm movement and helps in their activation.

3. **Identifying the Source of the Liquid**: The viscous liquid that activates sperm motility is known as semen. Semen is composed of various components, including water, plasma, and mucus, which aid in lubrication and provide a suitable environment for sperm.

4. **Composition of Semen**: Semen is primarily produced by the secretory cells of the male reproductive system, particularly from the seminal vesicles, prostate gland, and bulbourethral glands. These glands contribute to the fluid that nourishes and activates sperm.

5. **Evaluating the Options**:
- The first option states that the viscous liquid is secreted by the secretory cells of the epithelial lining of the genital tract. This is correct, as these cells produce the components of semen.
- The second option suggests that sperm itself produces the liquid, which is incorrect since sperm do not produce semen.
- The third option mentions the connective tissue of the uterus, which is also incorrect as it pertains to the female reproductive system.

6. **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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