The secondary oocyte completes its second meiotic division

Correct Answer: A

Rationale: The correct answer is A: just after fertilization. After fertilization, the secondary oocyte completes its second meiotic division, forming a mature ovum and a polar body. This process occurs to ensure the correct chromosome number in the resulting zygote. Choices B, C, and D are incorrect because the completion of the second meiotic division occurs specifically after fertilization, not before or just after ovulation or fertilization.

Correct Answer: B

Rationale: The correct answer is B: ovulation. Ovulation is the process where the ovarian follicle ruptures and releases an ovum. This occurs around the middle of the menstrual cycle. Menopause (A) is the cessation of menstrual periods, not the release of an ovum. Implantation (C) is the attachment of a fertilized egg to the uterine wall, not the release of an ovum. Breast (D) is not related to the process of ovulation.

Correct Answer: A

Rationale: The correct answer is A: dysmenorrhoea. Dysmenorrhoea specifically refers to abdominal pain caused by uterine cramps during menstruation. "Dys-" means difficult or painful, and "menorrhoea" refers to menstruation. Choice B, hypermenorrhoea, refers to abnormally heavy menstrual bleeding, not abdominal pain. Choice C, menometrorrhagia, refers to irregular and excessive uterine bleeding, not specifically related to abdominal pain. Choice D, polymenorrhoea, refers to frequent menstrual cycles, not abdominal pain. In summary, dysmenorrhoea is the correct answer because it accurately describes the abdominal pain associated with uterine cramps during menstruation, while the other choices pertain to different menstrual abnormalities.

Correct Answer: A

Rationale: Rationale for Correct Answer A: The efferent ducts continue the rete testis. This is true because the efferent ducts are a series of small ducts that connect the rete testis to the epididymis. The rete testis is a network of tubules located at the back of the testicle where spermatozoa from the seminiferous tubules are collected. Therefore, the efferent ducts serve to transport spermatozoa from the rete testis to the epididymis for further maturation. Summary of Incorrect Choices: B: Opening in the epididymal duct is incorrect because the efferent ducts lead into the epididymis, not the epididymal duct itself. C: Opening in the deferent duct is incorrect because the efferent ducts do not lead directly into the deferent duct, but rather connect the rete testis to the epididym

Correct Answer: B

Rationale: The correct answer is B: shelters the male gonad. The scrotum houses and protects the testes, the male gonads responsible for sperm production. This is crucial for maintaining optimal temperature for spermatogenesis. Choices A, C, and D are incorrect as the scrotum is located below the external male genital organ, has separate tunics from the abdominal wall, and is considered part of the external genital organs.