Which part of the male reproductive system is responsible for storing and maturing sperm?

Correct Answer: C

Rationale: The correct answer is C: Epididymis. The epididymis is responsible for storing and maturing sperm. Sperm are produced in the testes and then travel to the epididymis for storage and maturation. The other choices, A: Seminal vesicles, B: Prostate gland, and D: Vas deferens, are not directly involved in storing and maturing sperm. Seminal vesicles and prostate gland produce fluids that nourish and protect sperm, while vas deferens is responsible for transporting sperm from the epididymis to the urethra during ejaculation.

Correct Answer: B

Rationale: The correct answer is B: Uterus. After fertilization, the fertilized egg travels from the fallopian tube to the uterus for implantation. The uterus provides a suitable environment for the development of the embryo. The other choices are incorrect because: A: Ovary - Ovaries produce eggs but do not have a direct role in the implantation of the fertilized egg. C: Fallopian tube - While fertilization occurs in the fallopian tube, implantation takes place in the uterus. D: Cervix - The cervix is the lower part of the uterus that connects to the vagina and plays a role in facilitating sperm entry into the uterus, not in implantation.

Correct Answer: A

Rationale: The correct answer is A: Seminal vesicles. Seminal vesicles are responsible for secreting fluid that nourishes sperm. This fluid provides nutrients and energy for the sperm to survive and swim. The other choices are incorrect because: B: Prostate gland secretes a fluid that helps with sperm motility and viability, but it does not specifically nourish sperm. C: Epididymis is a coiled tube where sperm mature and are stored, but it does not secrete nourishing fluid. D: Testes produce sperm and testosterone but do not secrete nourishing fluid for sperm.

Correct Answer: A

Rationale: The correct answer is A: Secretes seminal fluid. The prostate gland in males secretes a milky fluid that makes up a significant portion of semen. This fluid helps nourish and protect sperm, aiding in their motility and viability. It also contains enzymes that aid in the liquefaction of semen after ejaculation. Summary: B: Produces sperm - Incorrect. Sperm is produced in the testes, not the prostate gland. C: Produces testosterone - Incorrect. Testosterone is primarily produced in the testes and is not a function of the prostate gland. D: Stores sperm - Incorrect. Sperm is stored in the epididymis and vas deferens, not the prostate gland.

Correct Answer: D

Rationale: The correct answer is D: hCG (human chorionic gonadotropin). hCG is produced by the placenta to maintain early pregnancy by supporting the corpus luteum, which in turn produces progesterone necessary for maintaining the uterine lining. Prolactin is responsible for milk production, not maintaining pregnancy. Estrogen plays a role in the menstrual cycle but is not the primary hormone for early pregnancy maintenance. Progesterone is crucial for pregnancy but is supported by hCG in the early stages.