Which structure is responsible for providing nutrients and oxygen to the developing fetus?

Correct Answer: A

Rationale: The correct answer is A: Placenta. The placenta is responsible for providing nutrients and oxygen to the developing fetus through the umbilical cord. It acts as a barrier between the mother and the fetus, allowing for the transfer of essential substances while protecting the fetus from harmful substances. The ovary (B) is involved in producing eggs but does not provide nutrients to the fetus. The fallopian tube (C) is where fertilization typically occurs, not nutrient transfer. The cervix (D) is the lower part of the uterus that connects to the vagina and plays a role in childbirth, but it is not responsible for providing nutrients and oxygen to the fetus.

Correct Answer: C

Rationale: The correct answer is C: Epididymis. After sperm is produced in the testes, it moves to the epididymis for storage and maturation. The epididymis is a coiled tube located on the back of each testicle. It stores sperm until they are ready to be ejaculated. The other choices are incorrect because: A: Vas deferens carries sperm from the epididymis to the urethra, B: Seminal vesicles produce seminal fluid, and D: Urethra is a tube that carries urine and semen out of the body, but does not store sperm.

Correct Answer: B

Rationale: The correct answer is B: Support and nourish developing sperm. Sertoli cells provide physical and nutritional support to developing sperm cells, assisting in their maturation process. This function is crucial for sperm production and male fertility. Choices A, C, and D are incorrect because Sertoli cells do not produce testosterone (produced by Leydig cells), store sperm (done by the epididymis), or produce semen (seminal vesicles and prostate gland produce components of semen).

Correct Answer: A

Rationale: During the follicular phase of the menstrual cycle, the follicle stimulating hormone (FSH) stimulates the growth of a dominant follicle, which eventually leads to ovulation. Ovulation typically occurs around the middle of the menstrual cycle, about 14 days before the start of the next menstrual period. This is when the mature egg is released from the ovary into the fallopian tube. Therefore, the correct answer is A: Follicular phase. Choice B: Luteal phase is incorrect because ovulation precedes the luteal phase. Choice C: Menstrual phase is incorrect as ovulation occurs before menstruation. Choice D: Proliferative phase is incorrect because it occurs after ovulation.

Correct Answer: A

Rationale: The correct answer is A: Ovary. The ovary is responsible for the production of eggs through the process of ovulation. The other choices, B: Fallopian tube, C: Uterus, and D: Cervix, do not produce eggs. The fallopian tube is the site of fertilization, the uterus is where a fertilized egg implants and develops into a fetus, and the cervix is the lower part of the uterus that connects to the vagina. Therefore, the ovary is the only part of the female reproductive system involved in the actual production of eggs.