What is the purpose of the mucous plug in the cervix during pregnancy?

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.

Correct Answer: A

Rationale: Estrogen is the correct answer as it is the primary hormone responsible for the development of female reproductive organs like the ovaries, uterus, and breasts. Estrogen plays a crucial role in regulating the menstrual cycle and supporting pregnancy. Testosterone is a male sex hormone. Progesterone is important for maintaining pregnancy and regulating the menstrual cycle. FSH (Follicle-stimulating hormone) stimulates the growth of ovarian follicles but is not directly involved in the development of female reproductive organs.

Correct Answer: A

Rationale: The correct answer is A: Nourish the embryo. During pregnancy, the uterine lining, also known as the endometrium, thickens to provide a rich blood supply and nutrients to support the developing embryo. This lining helps in implantation and facilitates the exchange of oxygen, nutrients, and waste products between the mother and the embryo. Choice B is incorrect as uterine contractions are primarily controlled by the muscles of the uterus. Choice C is incorrect because the uterine lining does not directly support the fetus during delivery; rather, it is the uterine muscles that aid in labor. Choice D is incorrect as the placenta, not the uterine lining, is responsible for providing nutrients to the fetus.

Correct Answer: C

Rationale: The correct answer is C: Provide sexual pleasure. The clitoris is a highly sensitive organ with numerous nerve endings, making it a key structure for sexual arousal and pleasure in females. Stimulation of the clitoris can lead to sexual satisfaction and orgasm. Choices A, B, and D are incorrect because the clitoris does not provide support for the uterus, facilitate sperm entry, or support the vaginal walls. It is important to differentiate between the functions of different reproductive organs to understand their roles in the body.

Correct Answer: B

Rationale: The correct answer is B: Passage for sperm into the uterus. Rationale: 1. The vagina serves as a pathway for sperm to travel from the male reproductive system into the female reproductive system. 2. Sperm must travel through the vagina to reach the cervix, uterus, and fallopian tubes for fertilization to occur. 3. The vagina also provides a passageway for the delivery of the baby during childbirth. Summary: A: Production of eggs - Incorrect. Eggs are produced in the ovaries, not the vagina. C: Secretion of estrogen - Incorrect. Estrogen is produced by the ovaries and plays a role in the menstrual cycle, not in the vagina. D: Site of fertilization - Incorrect. Fertilization typically occurs in the fallopian tubes, not the vagina.