Free Human Reproductive System MCQs with Answers
109 Human Reproductive System MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The human reproductive system includes the male and female organs that produce gametes, secrete sex hormones and support fertilization and development. Questions cover the testes, ovaries, reproductive ducts, menstrual and ovarian cycles, ovulation, fertilization, implantation, placenta formation and the roles of FSH, LH, oestrogen, progesterone and testosterone.
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- A. seminiferous tubules
- B. epididymis
- C. prostate gland
- D. vas deferens
Explanation: The germinal epithelium lining the seminiferous tubules of the testis divides by mitosis and then meiosis to form spermatids, which mature…
Correct answer: seminiferous tubules- A. Sertoli cells
- B. interstitial cells of Leydig
- C. germinal epithelium
- D. seminal vesicles
Explanation: The Leydig cells lie in the connective tissue between the seminiferous tubules and secrete testosterone in response to luteinising hormone…
Correct answer: interstitial cells of Leydig- A. uterus
- B. cervix
- C. ampulla of the fallopian tube
- D. ovary
Explanation: The secondary oocyte is swept into the oviduct at ovulation and meets sperm in the wide upper third, the ampulla, within about a day.
Correct answer: ampulla of the fallopian tube- A. myometrium
- B. perimetrium
- C. cervix
- D. endometrium
Explanation: The endometrium is the inner glandular lining of the uterus, thickened and richly supplied with blood by progesterone during the secretory…
Correct answer: endometrium- A. luteinising hormone
- B. follicle stimulating hormone
- C. progesterone
- D. human chorionic gonadotropin
Explanation: The chorion of the young embryo secretes hCG, which keeps the corpus luteum alive so that progesterone continues and the endometrium is…
Correct answer: human chorionic gonadotropin- A. Production of the fetus's red blood cells
- B. Exchange of oxygen and carbon dioxide
- C. Secretion of progesterone and hCG
- D. Transfer of nutrients from mother to fetus
Explanation: The fetus makes its own blood cells, first in the yolk sac and liver and later in the bone marrow, and maternal and fetal blood never…
Correct answer: Production of the fetus's red blood cells- A. the mitochondria that power the tail
- B. hydrolytic enzymes that digest the coverings of the egg
- C. the haploid nucleus
- D. contractile proteins of the flagellum
Explanation: The acrosome is a lysosome like cap over the front of the head, and its enzymes, including hyaluronidase, break down the corona radiata…
Correct answer: hydrolytic enzymes that digest the coverings of the egg- A. head
- B. acrosome
- C. middle piece
- D. tip of the tail
Explanation: A spiral sheath of mitochondria wraps the middle piece and supplies the ATP that the flagellum needs for the long journey to the oviduct.
Correct answer: middle piece- A. 23
- B. 46
- C. 44
- D. 92
Explanation: The first meiotic division is completed before ovulation and halves the chromosome number, so the secondary oocyte is haploid with 23…
Correct answer: 23- A. four functional ova
- B. two ova and two polar bodies
- C. one ovum and three polar bodies
- D. four polar bodies and no ovum
Explanation: Cytoplasmic division in oogenesis is deliberately unequal, so almost all the cytoplasm and stored food goes to one cell while the other…
Correct answer: one ovum and three polar bodies- A. chorion
- B. allantois
- C. amnion
- D. yolk sac
Explanation: The amnion encloses the amniotic fluid in which the fetus floats, spreading any pressure evenly, keeping the temperature steady and…
Correct answer: amnion- A. deoxygenated blood from the fetus to the placenta
- B. oxygenated blood from the placenta to the fetus
- C. fetal urine to the placenta for disposal
- D. maternal blood directly into the fetal circulation
Explanation: The cord contains two arteries and one vein, and as always the vein is named for the direction of flow towards the heart, so it brings…
Correct answer: oxygenated blood from the placenta to the fetus- A. ovaries
- B. uterus
- C. oviducts
- D. vagina
Explanation: The ovaries are both the source of egg cells and an endocrine gland, releasing the hormones that control the menstrual cycle and…
Correct answer: ovaries14. The inner lining of the uterus, which thickens each cycle and is shed during menstruation, is the
- A. perimetrium
- B. endometrium
- C. myometrium
- D. cervix
Explanation: The endometrium is the hormonally responsive layer where the embryo implants.
Correct answer: endometrium- A. seminal vesicles
- B. prostate gland
- C. epididymis
- D. urethra
Explanation: Sperm leaving the seminiferous tubules are not yet motile; they gain the ability to swim while passing through the coiled epididymis where…
Correct answer: epididymis- A. glucose
- B. sucrose
- C. lactose
- D. fructose
Explanation: Fructose provides the energy that powers the tail of the sperm during its journey.
Correct answer: fructose- A. sperm production needs a temperature slightly below body temperature
- B. the testes are too large to fit inside the abdomen
- C. testosterone breaks down at body temperature
- D. sperm must be released directly to the outside
Explanation: Spermatogenesis fails at the normal 37 degrees of the abdomen, so the scrotum keeps the testes about two degrees cooler.
Correct answer: sperm production needs a temperature slightly below body temperature- A. one artery and one vein
- B. two arteries and one vein
- C. two arteries and two veins
- D. one artery and two veins
Explanation: Two umbilical arteries carry deoxygenated blood and wastes from fetus to placenta, while the single umbilical vein returns oxygenated…
Correct answer: two arteries and one vein- A. meiosis
- B. gastrulation
- C. cleavage
- D. implantation
Explanation: Cleavage divides the zygote into a ball of smaller cells as it travels down the oviduct, forming the morula and then the blastocyst.
Correct answer: cleavage- A. Prostate gland
- B. Vas deferens
- C. Seminal vesicle
- D. Uterus
Explanation: The uterus belongs to the female system, where it nourishes the developing fetus.
Correct answer: UterusHuman Reproductive System MCQs: common questions
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There are 109 Human Reproductive System MCQs in the Biology bank, shown 20 to a page with the correct answer and an explanation on each.
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Yes. Each Human Reproductive System question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
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