Which part of the sperm contains enzymes to penetrate the ovum?

Correct Answer: C

Rationale: The correct answer is C: Acrosome. The acrosome is a structure located at the head of the sperm that contains enzymes necessary for penetrating the ovum during fertilization. These enzymes help dissolve the protective layers surrounding the ovum, allowing the sperm to enter and fertilize the egg. Choice A: Head is incorrect because the head of the sperm contains the nucleus with genetic material, not the enzymes needed for penetration. Choice B: Tail is incorrect as it is responsible for providing motility to the sperm, not for penetration. Choice D: Midpiece is incorrect as it contains mitochondria that provide energy for the sperm's movement, not enzymes for penetrating the ovum.

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.

Correct Answer: C

Rationale: The correct answer is C: LH (Luteinizing Hormone). LH is responsible for triggering ovulation, the release of an egg from the ovary. It surges around mid-cycle to stimulate the mature egg's release. Estrogen and progesterone play roles in the menstrual cycle but do not directly trigger ovulation. FSH (Follicle-Stimulating Hormone) helps in follicle development but does not induce ovulation. Therefore, LH is the hormone specifically responsible for this crucial reproductive process in females.