What is the primary function of the seminiferous tubules in males?

Correct Answer: C

Rationale: The primary function of the seminiferous tubules in males is to produce sperm. Sperm production, known as spermatogenesis, occurs within the seminiferous tubules through a series of cell divisions and maturation processes. This process is essential for male fertility and reproduction. Therefore, choice C is correct. Choice A (Produce seminal fluid) is incorrect because seminal fluid is primarily produced by the seminal vesicles and prostate gland. Choice B (Mature sperm) is partially correct but not the primary function of the seminiferous tubules. While sperm maturation does occur in the epididymis, the main role of the seminiferous tubules is sperm production. Choice D (Secrete testosterone) is incorrect because testosterone is primarily produced by the Leydig cells in the testes, not in the seminiferous tubules.

Correct Answer: C

Rationale: The correct answer is C: Transport eggs from the ovary to the uterus. The fallopian tubes serve as a passageway for eggs released from the ovary to travel to the uterus for potential fertilization. This is a crucial function in the reproductive process. The other choices are incorrect because: A: The fallopian tubes do not transport sperm; they transport eggs. B: The production of eggs occurs in the ovaries, not in the fallopian tubes. D: Estrogen is primarily produced by the ovaries and other endocrine glands, not by the fallopian tubes.

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.