Which of the following hormones plays a role in the production of sperm in males?

Correct Answer: D

Rationale: The correct answer is D: All of the above. 1. FSH (Follicle-Stimulating Hormone) stimulates the production of sperms in the testes. 2. LH (Luteinizing Hormone) stimulates Leydig cells in the testes to produce testosterone, which is essential for sperm production. 3. Testosterone is crucial for the maintenance of spermatogenesis. Therefore, all three hormones (FSH, LH, Testosterone) play a significant role in the production of sperm. Choice A is incorrect because FSH alone is not solely responsible for sperm production. Choice B is incorrect because LH alone does not directly produce sperm. Choice C is incorrect because while testosterone is essential for sperm production, it is not the only hormone involved.

Correct Answer: B

Rationale: The correct answer is B: Progesterone. Progesterone helps prevent ovulation during pregnancy by maintaining the uterine lining and inhibiting the release of additional eggs. Estrogen supports the development of the uterine lining but does not directly prevent ovulation. hCG is produced by the placenta to support pregnancy but does not prevent ovulation. Testosterone is not involved in regulating ovulation during pregnancy.

Correct Answer: D

Rationale: The purpose of the bulbourethral glands is to lubricate the urethra before ejaculation. This lubrication helps to neutralize any acidic urine remnants in the urethra, providing a more suitable environment for sperm to pass through. The other choices are incorrect because: A: Sperm is produced in the testes, not the bulbourethral glands. B: Testosterone is mainly produced in the testes and adrenal glands. C: Semen is produced by the seminal vesicles, prostate gland, and sperm from the testes.

Correct Answer: C

Rationale: The Leydig cells in males are responsible for producing testosterone, a key hormone that plays a crucial role in male reproductive functions such as sperm production, libido, and muscle development. This hormone is essential for the development and maintenance of male reproductive organs and secondary sexual characteristics. Leydig cells do not store sperm (Choice A), produce seminal fluid (Choice B), or mature sperm (Choice D). Testosterone production is the primary function of Leydig cells, making Choice C the correct answer.

Correct Answer: A

Rationale: The correct answer is A: Ovary. The ovary is the primary organ responsible for producing estrogen in the female reproductive system. Estrogen is mainly produced by the ovarian follicles. It plays a crucial role in regulating the menstrual cycle, maintaining bone density, and promoting the development of female secondary sexual characteristics. The other choices, B: Uterus, C: Fallopian tube, and D: Cervix, do not produce estrogen. The uterus is responsible for implantation and gestation of a fertilized egg, the fallopian tube is where fertilization occurs, and the cervix is the lower part of the uterus that connects to the vagina.