Which part of the female reproductive system is responsible for the production of estrogen?

Correct Answer: A

Rationale: The correct answer is A: Ovary. Estrogen is primarily produced by the ovaries, specifically by the ovarian follicles. The ovaries contain specialized cells that produce estrogen in response to hormonal signals. Estrogen plays a crucial role in regulating the menstrual cycle, promoting the development of secondary sexual characteristics, and maintaining reproductive health. The other choices (B: Uterus, C: Fallopian tubes, D: Cervix) are incorrect because they do not play a direct role in the production of estrogen. The uterus is the organ where a fertilized egg implants and develops during pregnancy. The fallopian tubes are responsible for transporting eggs from the ovaries to the uterus. The cervix is the lower part of the uterus that connects to the vagina. While these structures are important for reproduction, they do not produce estrogen.

Correct Answer: B

Rationale: Progesterone during pregnancy maintains the uterine lining by supporting the implantation and growth of the embryo. This hormone helps prevent the shedding of the uterine lining which is crucial for a successful pregnancy. Progesterone does not stimulate uterine contractions (choice A), inhibit ovulation (choice C), or stimulate milk production (choice D) during pregnancy.

Correct Answer: A

Rationale: The correct answer is A: Epididymis. The epididymis is a tightly coiled tube where sperm are stored and matured until ejaculation. It allows for the concentration and storage of sperm produced by the testes. The other choices are incorrect because: B: Seminal vesicles produce a fluid that nourishes and protects sperm, not store sperm. C: Vas deferens transports sperm from the epididymis to the urethra, but doesn't store sperm. D: Prostate gland produces a fluid that mixes with sperm to form semen, but does not store sperm.

Correct Answer: A

Rationale: The correct answer is A: Maturation and storage of sperm. The epididymis is a coiled tube where sperm mature and are stored before ejaculation. Sperm are produced in the testes, not the epididymis, so choice B is incorrect. Seminal fluid is produced by the seminal vesicles and prostate gland, not the epididymis, making choice C incorrect. Lastly, the vas deferens is responsible for transporting sperm to the urethra, not the epididymis, so choice D is incorrect.

Correct Answer: A

Rationale: The mucous plug in the cervix during pregnancy serves to prevent infection by acting as a physical barrier, blocking the entry of harmful pathogens into the uterus and protecting the developing fetus. It does not facilitate sperm transport, as sperm travel through the cervical canal before pregnancy. It also does not enhance uterine contractions or nourish the embryo, as those functions are carried out by other mechanisms in the body during pregnancy.