Free Human Reproductive System MCQs with Answers

41. Spermatogenesis occurs in the

• A. Epididymis
• B. Seminiferous tubules
• C. Vas deferens
• D. Seminal vesicle

Explanation: Spermatogenesis (sperm production) occurs in the seminiferous tubules of the testes.

42. The acrosome contains

• A. Mitochondria
• B. Digestive enzymes
• C. DNA
• D. Flagellar proteins

Explanation: The acrosome contains hydrolytic enzymes (hyaluronidase, proteases) that help sperm penetrate the egg.

43. Fertilization normally occurs in the

• A. Uterus
• B. Ovary
• C. Fallopian tube
• D. Vagina

Explanation: Fertilization typically occurs in the ampulla of the fallopian tube (oviduct).

44. The morula develops into

• A. Zygote
• B. Blastocyst
• C. Gastrula
• D. Neurula

Explanation: The morula (solid ball of cells) develops into a blastocyst (with inner cell mass and blastocoel) before implantation.

45. Receive, retain and nourish a fertilized ovum is the main function of:

• A. Cervix
• B. Uterus
• C. Ovary
• D. Oviduct

Explanation: The blastocyst implants in the thickened endometrium of the uterus, which then supports the pregnancy through the placenta, so receiving, retaining and nourishing are all uterine functions. The oviduct is where fertilisation itself occurs, which is why it is the closest distractor, but the embryo only passes through it. The ovary releases the egg and the cervix is the muscular opening into the vagina.

46. The process of spermatogenesis occurs in which part of the male reproductive system?

• A. Seminiferous tubules
• B. Vas deferens
• C. Scrotum
• D. Epididymis

Explanation: The germinal epithelium lining the seminiferous tubules divides by mitosis and then meiosis to produce spermatids, which mature into spermatozoa. The epididymis stores sperm and gives them motility after they leave the testis, so it is the closest distractor but hosts no division. The scrotum is the sac holding the testes, keeping them a few degrees below core temperature.

47. Which layer of uterus nourishes the embryo after implantation?

• A. Cervical epithelium
• B. Myometrium
• C. Endometrium
• D. Perimetrium

Explanation: The endometrium is the inner glandular lining, thickened and richly supplied with blood by progesterone, and it is where the blastocyst implants and from which the maternal part of the placenta develops. The myometrium is the thick smooth muscle whose contractions expel the baby at birth, and the perimetrium is the outer covering. Shedding of the endometrium is what menstruation consists of.