What is the primary function of the testes?

Correct Answer: B

Rationale: The primary function of the testes is to produce sperm, making option B the correct answer. Sperm production occurs in the seminiferous tubules within the testes. Estrogen production primarily occurs in the ovaries, not the testes (eliminating choice A). Storing sperm is mainly the role of the epididymis, not the testes (eliminating choice C). Testosterone secretion is a crucial function of the testes, but it is not the primary function (eliminating choice D). In summary, the testes' primary function is to produce sperm, making it the correct choice.

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: A

Rationale: The correct answer is A: FSH (Follicle-Stimulating Hormone). FSH stimulates the growth and maturation of ovarian follicles in the ovaries. It plays a crucial role in the development of eggs and the regulation of the menstrual cycle. LH (Choice B) is responsible for ovulation, estrogen (Choice C) is produced by the developing follicle, and progesterone (Choice D) is primarily involved in preparing the uterus for pregnancy.

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).