Question

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

• A. epididymis to vas deferens
• B. testes to epididymis
• C. vagina to uterus
• D. ovary to uterus

Answer 1

The correct option is B

testes to epididymis

The correct option is B.

Explanation of the correct option:

1. Fusion of female and male gametes produced in their separate reproductive systems is required for human reproduction.
2. The male gamete is called sperm, while the female gamete is called ovum or egg.
3. Vasa efferentia are thin ciliated ductules that emerge from the seminiferous tubules of the testis (where sperms are created) and open into the epididymis, a mass of long narrow tightly coiled tubules that runs down the inner side of the testis.
4. The sperm are stored in the epididymis.
5. Sperm will not be transferred from the testes to the epididymis if the vasa efferentia is obstructed.

Explanation of the incorrect option:

Option A:

1. Vasa efferentia exists between the testes and the epididymis.
2. As a result, if the vasa efferentia is obstructed, sperm cannot go from the testes to the epididymis and so to the vas deferens.

Option C:

1. The uterus and vagina are female reproductive organs and the vasa efferentia is a male reproductive organ that is situated between the testes and the epididymis
2. So if the vasa efferentia is obstructed, sperm cannot go from the testes to the epididymis and so to the vas deferens.

Option D:

1. The fallopian tubes, not the vasa efferentia, assist the transfer of female gametes from the ovary to the uterus.
2. Furthermore, the female reproductive system lacks vasa efferentia.

Final answer: If for some reason, the vasa efferentia in the human reproductive system gets blocked, the gametes will not be transported from testes to the epididymis.