What is the role of the pituitary gland in the male reproductive system?

Correct Answer: C

Rationale: The pituitary gland in the male reproductive system secretes follicle-stimulating hormone (FSH) and luteinizing hormone (LH) to regulate sperm production. FSH stimulates sperm production in the testes, while LH stimulates the production of testosterone by the Leydig cells. This hormonal regulation is essential for maintaining proper sperm production and male reproductive function. Choices A and D are incorrect because the pituitary gland does not secrete estrogen or testosterone directly. Choice B is incorrect because sperm production is not directly produced by the pituitary gland but is regulated by the hormones it secretes.

Correct Answer: A

Rationale: Estrogen is the correct answer as it stimulates the growth of the uterine lining during the menstrual cycle. Estrogen is produced by the ovaries and peaks around ovulation, promoting the thickening of the endometrium to prepare for potential implantation. Progesterone, on the other hand, helps maintain the uterine lining after it has been thickened by estrogen. FSH and LH are involved in follicle development and ovulation, respectively, but they do not directly stimulate uterine lining growth.

Correct Answer: A

Rationale: The correct answer is A because the prostate gland produces seminal fluid, which is a key component of semen. This fluid helps nourish and protect sperm. The other choices are incorrect because the prostate gland does not store sperm (B), produce eggs (C), or secrete testosterone (D). Sperm is primarily stored in the epididymis, eggs are produced in the ovaries, and testosterone is mainly secreted by the testes. Therefore, the prostate gland's main function is to produce seminal fluid, making choice A the correct answer.

Correct Answer: C

Rationale: The corpus luteum is formed from the ruptured follicle after ovulation. It secretes progesterone to prepare and maintain the uterine lining for potential implantation of a fertilized egg. This is crucial for a successful pregnancy. Options A, B, and D are incorrect because the corpus luteum's main function is to secrete progesterone, not to stimulate ovulation, produce estrogen, or mature eggs.

Correct Answer: D

Rationale: The correct answer is D: Epididymis. The epididymis is a coiled tube located on the back of each testicle where sperm mature and are stored before ejaculation. It allows for sperm to gain motility and fertilizing ability. The other choices (A, B, C) are incorrect because the vas deferens is the tube that carries sperm from the epididymis to the urethra, seminal vesicles produce seminal fluid that nourishes and transports sperm, and the prostate gland secretes fluids that protect and nourish sperm, but none of these structures store sperm before ejaculation.