Which hormone helps prepare the uterus for pregnancy?

Correct Answer: A

Rationale: Progesterone is the correct answer as it helps prepare the uterus for pregnancy by thickening the uterine lining to support implantation of a fertilized egg. Estrogen stimulates the growth of the uterine lining. FSH and LH are involved in the regulation of the menstrual cycle and ovulation, not specifically in preparing the uterus for pregnancy.

Correct Answer: A

Rationale: The correct answer is A: Prevent infection and maintain pregnancy. The cervix acts as a physical barrier to prevent infections from reaching the uterus, protecting the developing fetus. It also produces mucus that blocks the entry of harmful microorganisms. Additionally, the cervix helps maintain the pregnancy by staying closed and firm until it's time for labor. Choice B (Facilitate sperm entry) is incorrect because the cervix actually filters and allows only healthy sperm to pass through. Choice C (Support implantation of the fertilized egg) is incorrect because the cervix is not directly involved in the implantation process, which occurs in the uterus. Choice D (Produce estrogen) is incorrect because estrogen is primarily produced by the ovaries, not the cervix.

Correct Answer: C

Rationale: The correct answer is C: Seminal vesicles. Seminal vesicles produce seminal fluid, which is a major component of semen. This fluid provides nutrients and protection for sperm, aiding in their motility and survival. The other choices are incorrect because: A: Epididymis - Stores and transports sperm, but does not produce seminal fluid. B: Prostate gland - Produces a milky fluid that helps nourish and protect sperm, but it is not the primary site for seminal fluid production. D: Testes - Produce sperm through spermatogenesis, but do not directly produce seminal fluid.

Correct Answer: B

Rationale: The correct answer is B. The primary function of the vagina is to facilitate sperm entry into the uterus during sexual intercourse for fertilization to occur. The vagina serves as the passageway for sperm to travel from the penis into the uterus where fertilization takes place. The other choices are incorrect for the following reasons: A: Support implantation - Implantation occurs in the uterus, not the vagina. C: Store eggs - Eggs are stored in the ovaries, not the vagina. D: Secrete estrogen - Estrogen is primarily produced by the ovaries, not the vagina.

Correct Answer: A

Rationale: The correct answer is A: LH (Luteinizing Hormone). LH surge triggers ovulation by stimulating the release of eggs from the ovary. It works in conjunction with FSH to facilitate follicle development. Estrogen supports the growth of the uterine lining, while progesterone maintains it post-ovulation. FSH is responsible for follicle development but isn't the primary hormone for egg release.