Which part of the female reproductive system is responsible for the implantation of the fertilized egg?

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: 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.

Correct Answer: B

Rationale: The main function of the corpus luteum is to produce progesterone. After ovulation, the corpus luteum forms from the ruptured follicle and secretes progesterone to prepare the uterine lining for implantation. Progesterone also helps maintain the early stages of pregnancy. Estrogen is mainly produced by the follicles, not the corpus luteum. The corpus luteum does not stimulate ovulation; that is the role of the follicles. Supporting implantation is more related to the actions of progesterone rather than the corpus luteum itself.

Correct Answer: B

Rationale: The correct answer is B: The vagina transports sperm from the cervix to the uterus. This is because the vagina serves as the passageway for sperm to travel from the cervix through the uterus and into the fallopian tubes to fertilize the egg. The other choices are incorrect because: A) Fertilization typically occurs in the fallopian tubes, not the vagina. C) Estrogen is primarily produced by the ovaries, not the vagina. D) Sperm is not stored in the vagina after ejaculation, as it quickly travels through the cervix to reach the uterus.