Regarding gross anatomy of male reproductive system

Correct Answer: B

Rationale: The correct answer is B because the ductus deferens penetrates the prostate gland to connect with the prostatic urethra, forming the ejaculatory duct. This allows for the transport of sperm from the epididymis to the urethra during ejaculation. A: Dartos muscle is responsible for wrinkling the scrotal skin but not raising and lowering the testes. C: The anterior lobe of the prostate gland mainly consists of fibromuscular tissue, not glandular tissue. D: Buck's fascia surrounds the corpora cavernosa and the corpus spongiosum of the penis, not the body of the penis itself.

Correct Answer: B

Rationale: The correct answer is B: testis. The testis is the primary male sex organ responsible for producing sperm and testosterone. It is located within the scrotum. The penis (choice A) is the male reproductive organ used for sexual intercourse but is not the primary sex organ. The scrotum (choice C) is the external sac that houses the testes but is not the primary sex organ itself. The epididymis (choice D) is a coiled tube located on the testis where sperm mature and are stored, but it is not the primary sex organ.

Correct Answer: C

Rationale: The correct answer is C: secretion of alkaline mucus. The prostate gland produces alkaline mucus that helps neutralize the acidic environment of the vagina, thus enhancing sperm viability. Spermatogenesis (choice A) occurs in the testes, not the prostate. The production of glycogen (choice B) is not a function of the prostate. While the prostate does play a role in sperm transport and nourishment, it does not directly impact the maturation of sperm cells (choice D).

Correct Answer: C

Rationale: The correct answer is C (ovum) because the ovum is the mature and fertilized egg cell resulting from the fusion of a sperm cell and an egg cell during fertilization. The primary oocyte (A) is an immature egg cell that has not undergone fertilization. The secondary oocyte (B) is the egg cell released during ovulation but has not yet been fertilized. Oogonia (D) are the precursor cells that give rise to primary oocytes through the process of oogenesis. Therefore, the ovum is the only choice that accurately represents a fertilized egg cell.

Correct Answer: C

Rationale: The correct answer is C: vulva. The vulva includes the labia, clitoris, and vestibular glands. The labia are the outer folds of skin, the clitoris is a highly sensitive erectile structure, and the vestibular glands are located around the vaginal opening. The vulva encompasses all these structures, making it the most inclusive term among the options provided. The other choices are incorrect because they are specific structures that are part of the vulva but do not encompass all the other terms listed.