What is the role of the epididymis in the male reproductive system?

Correct Answer: A

Rationale: The correct answer is A: Sperm maturation and storage. The epididymis is where sperm produced in the testes mature and are stored until ejaculation. It provides a suitable environment for sperm maturation through the absorption of excess fluid and nutrients. It also helps in the development of sperm motility. Choices B and C are incorrect because sperm production occurs in the testes, and testosterone is primarily produced in the testes and adrenal glands. Choice D is incorrect because the transport of sperm to the urethra is mainly facilitated by the vas deferens.

Correct Answer: C

Rationale: The correct answer is C: LH (Luteinizing Hormone). LH is responsible for triggering ovulation, the release of an egg from the ovary. It surges around mid-cycle to stimulate the mature egg's release. Estrogen and progesterone play roles in the menstrual cycle but do not directly trigger ovulation. FSH (Follicle-Stimulating Hormone) helps in follicle development but does not induce ovulation. Therefore, LH is the hormone specifically responsible for this crucial reproductive process in females.

Correct Answer: A

Rationale: The correct answer is A: Placenta. The placenta is responsible for providing nutrients and oxygen to the developing fetus through the umbilical cord. It acts as a barrier between the mother and the fetus, allowing for the transfer of essential substances while protecting the fetus from harmful substances. The ovary (B) is involved in producing eggs but does not provide nutrients to the fetus. The fallopian tube (C) is where fertilization typically occurs, not nutrient transfer. The cervix (D) is the lower part of the uterus that connects to the vagina and plays a role in childbirth, but it is not responsible for providing nutrients and oxygen to the fetus.

Correct Answer: A

Rationale: The correct answer is A: FSH (Follicle-Stimulating Hormone). FSH stimulates the growth and maturation of ovarian follicles in the ovaries. It plays a crucial role in the development of eggs and the regulation of the menstrual cycle. LH (Choice B) is responsible for ovulation, estrogen (Choice C) is produced by the developing follicle, and progesterone (Choice D) is primarily involved in preparing the uterus for pregnancy.

Correct Answer: C

Rationale: The correct answer is C: Epididymis. After sperm is produced in the testes, it moves to the epididymis for storage and maturation. The epididymis is a coiled tube located on the back of each testicle. It stores sperm until they are ready to be ejaculated. The other choices are incorrect because: A: Vas deferens carries sperm from the epididymis to the urethra, B: Seminal vesicles produce seminal fluid, and D: Urethra is a tube that carries urine and semen out of the body, but does not store sperm.