Free Human Reproductive System MCQs with Answers

• A. testosterone
• B. oestrogen
• C. progesterone
• D. insulin

Explanation: Testosterone from the Leydig cells stimulates the development of male secondary sexual characteristics and continues to support sperm…

• A. oviduct
• B. cervix
• C. ovary
• D. urethra

Explanation: The cervix produces mucus that changes through the cycle, guides sperm and protects the uterus during pregnancy.

• A. ovulation
• B. the shedding of the endometrium
• C. the development of follicles in the ovary
• D. the formation of the placenta

Explanation: FSH, follicle stimulating hormone, recruits a batch of follicles at the beginning of the cycle, and the growing follicle then secretes…

• A. progesterone
• B. LH
• C. FSH
• D. oestrogen

Explanation: Oestrogen from the developing follicle drives the endometrium to proliferate after menstruation.

• A. maintains the thickened endometrium ready for implantation
• B. immediately triggers menstruation
• C. stimulates a second ovulation
• D. dissolves the zona pellucida of the egg

Explanation: Progesterone makes the endometrium glandular and rich in blood supply, the state needed for an embryo to implant.

• A. ovary itself
• B. anterior pituitary through negative feedback
• C. posterior pituitary
• D. hypothalamus releasing oxytocin

Explanation: Oestrogen feeds back on the anterior pituitary to reduce FSH, which prevents several follicles from maturing at once.

• A. of menstruation itself
• B. before the follicle begins to grow
• C. between ovulation and the start of the next menstruation
• D. during which the egg is fertilised

Explanation: After ovulation the corpus luteum secretes progesterone for about fourteen days, the luteal phase.

• A. killing sperm in the vagina
• B. blocking the oviducts mechanically
• C. thickening the cervical mucus only
• D. suppressing ovulation through their oestrogen and progesterone content

Explanation: The steady hormones of the pill inhibit FSH and LH, so no follicle matures and no egg is released.

• A. degenerates into a scar called the corpus albicans
• B. continues to grow throughout the cycle
• C. develops into the placenta
• D. starts secreting hCG

Explanation: Without hCG from an embryo, the corpus luteum survives only about ten days and then degenerates, its progesterone falling to trigger…

• A. ovary
• B. anterior pituitary gland
• C. uterus
• D. thyroid gland

Explanation: The anterior pituitary releases both gonadotropins under direction from hypothalamic GnRH.

• A. 14 days
• B. 21 days
• C. 28 days
• D. 35 days

Explanation: Counting from the first day of one menstruation to the day before the next gives roughly 28 days, though normal cycles vary between about…

• A. a virus
• B. a fungus
• C. a protozoan
• D. the bacterium Treponema pallidum

Explanation: Treponema pallidum is a spirochaete bacterium, which is why syphilis responds to penicillin.

• A. human papillomavirus
• B. human immunodeficiency virus
• C. herpes simplex virus
• D. bacterium Neisseria gonorrhoeae

Explanation: Certain strains of HPV produce warts, and other high risk strains can transform cervical cells.

• A. gonorrhoea
• B. cervical cancer
• C. syphilis
• D. hepatitis A

Explanation: By immunising against the cancer causing strains of human papillomavirus, the vaccine prevents most cases of cervical cancer decades…

• A. syphilis
• B. gonorrhoea
• C. chlamydia
• D. genital herpes

Explanation: Chlamydia is the commonest bacterial STD and often passes unnoticed until it damages the oviducts, causing pelvic inflammatory disease and…

• A. Gonorrhoea
• B. Syphilis
• C. AIDS
• D. Trichomoniasis

Explanation: Trichomonas vaginalis is a flagellated protozoan causing discharge and irritation, and it is treated with antiprotozoal drugs.

• A. kidney stones
• B. diabetes mellitus
• C. anaemia
• D. pelvic inflammatory disease and infertility

Explanation: The gonococcus can climb from the cervix into the uterus and oviducts, inflaming and scarring them, which blocks the passage of eggs.

• A. Hepatitis B
• B. Gonorrhoea
• C. Syphilis
• D. HIV

Explanation: Hepatitis B virus spreads in blood and sexual fluids and can damage the liver, but a highly effective recombinant vaccine exists.

• A. only the partner showing symptoms
• B. both partners, to prevent reinfection
• C. only the male partner
• D. only the female partner

Explanation: An untreated partner harbours the organism and passes it straight back, so both must be treated even if one feels well.

• A. Secondary stage
• B. Tertiary stage
• C. Primary stage
• D. Congenital stage

Explanation: About three weeks after infection a chancre forms at the entry point, marking primary syphilis, and heals on its own, which lets the…