Which hormone is primarily responsible for ovulation?

Correct Answer: B

Rationale: The correct answer is B: LH. LH, or luteinizing hormone, is primarily responsible for triggering ovulation by stimulating the release of the mature egg from the ovary. FSH (A) helps in the development of the egg, but LH is the hormone that actually induces ovulation. Progesterone (C) and Estrogen (D) are important in the menstrual cycle and pregnancy, but they do not directly trigger ovulation.

Correct Answer: B

Rationale: Oxytocin is the correct answer because it is the hormone responsible for milk ejection during breastfeeding. When a baby suckles, oxytocin is released, causing the muscles around the milk-producing cells to contract and push milk into the ducts. Prolactin, on the other hand, is responsible for milk production but not ejection. Estrogen and progesterone play roles in preparing the breasts for milk production but are not directly involved in milk ejection.

Correct Answer: D

Rationale: The correct answer is D, "All of the above." The prostate gland, seminal vesicles, and bulbourethral gland all contribute to the production of seminal fluid. The prostate gland produces a milky fluid, the seminal vesicles produce a fluid rich in fructose, and the bulbourethral gland produces a clear lubricating fluid. Together, these glands provide the necessary components for semen, which is essential for sperm viability and motility. Therefore, all three glands are involved in the production of seminal fluid, making choice D the correct answer.

Correct Answer: A

Rationale: The correct answer is A: Sperm maturation and storage. The epididymis is where sperm produced in the testes mature and are stored until ejaculation. It provides a suitable environment for sperm maturation through the absorption of excess fluid and nutrients. It also helps in the development of sperm motility. Choices B and C are incorrect because sperm production occurs in the testes, and testosterone is primarily produced in the testes and adrenal glands. Choice D is incorrect because the transport of sperm to the urethra is mainly facilitated by the vas deferens.

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.