Free Reproduction MCQs with Answers
1,220 Reproduction MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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- A. Hormone-receptor complex
- B. Feedback system
- C. Prostaglandin
- D. Exocrine gland
Explanation: A thermostat is indeed a good example of a feedback system. In a feedback system, a change in one parameter triggers a response that…
Correct answer: Feedback system- A. Each gland secrete only one hormone
- B. Two hormones with opposite effects regulate certain things
- C. Only steroid hormones regulate important functions
- D. The pituitary gland regulate all the other glands
Explanation: There is a common mechanism in the endocrine system known as antagonistic control.
Correct answer: Two hormones with opposite effects regulate certain things- A. Decrease production of that substance
- B. Increase production of that substance
- C. Increase the production of other substances
- D. Stop production of another substance
Explanation: Explanation for this question will be added soon!
Correct answer: Decrease production of that substance- A. Adrenal medulla
- B. Testis
- C. Hypothalamus
- D. Pituitary
Explanation: The testes are the male gonads responsible for producing testosterone, the primary male sex hormone.The testes consist of many coiled…
Correct answer: Testis- A. Adrenal
- B. Hypothalamus
- C. Pancreas
- D. Parathyroid
Explanation: The pancreas is crucial in diabetes mellitus because it produces insulin, which helps regulate blood sugar levels.
Correct answer: Pancreas- A. Parathyroid
- B. Hypothalamus
- C. Pituitary
- D. Adrenal
Explanation: The adrenal glands, specifically the adrenal medulla (inner part), produce epinephrine (adrenaline) and norepinephrine (noradrenaline).
Correct answer: Adrenal- A. 5 and 8
- B. 9 and 15
- C. 16 and 19
- D. 20 and 25
Explanation: 9 to 15 is the most common range for the onset of puberty. Girls usually start puberty between ages 8 and 13, while boys typically begin…
Correct answer: 9 and 15- A. FSH and LH
- B. Estrogens
- C. Androgens
- D. Testosterone and progesterone
Explanation: FSH and LH are produced by the anterior pituitary gland in the brain. In males, FSH stimulates the testes to produce sperm cells, while LH…
Correct answer: FSH and LH- A. Birth
- B. Fertilization
- C. Gastrulation
- D. Puberty
Explanation: Puberty is the stage of development during which adolescents reach sexual maturity and become capable of reproduction.
Correct answer: Puberty- A. Egg
- B. Sperm
- C. Secondary male characteristics
- D. All of the above
Explanation: Testosterone plays a significant role in the development and maintenance of secondary sexual characteristics in males, such as facial…
Correct answer: Secondary male characteristics- A. Gametes
- B. Hormones
- C. Gonads
- D. Organs
Explanation: Gametes are specialized sex cells, such as sperm in males and eggs (ova) in females.
Correct answer: Gametes- A. One per day
- B. About 20 per year
- C. One between them each month
- D. 200 million at a time
Explanation: Each ovary typically takes turns releasing an egg every menstrual cycle, so while each ovary produce an egg every month and collectively…
Correct answer: One between them each month- A. Scrotum
- B. Epididymis
- C. Seminiferous tubules
- D. Vas deferens
Explanation: Seminiferous tubules are the actual structures within the testes where sperm production, or spermatogenesis, occurs.
Correct answer: Seminiferous tubules- A. To produce eggs
- B. To prepare the body to carry an embryo
- C. To deliver sperm
- D. To release eggs into the Fallopian tubes
Explanation: Delivering sperm is not a function of the female reproductive system. Sperm delivery is the role of the male reproductive system.
Correct answer: To deliver sperm- A. Female reproductive system
- B. Endocrine system
- C. Nervous system
- D. Male reproductive system
Explanation: The male reproductive system is responsible for making and delivering sperm.
Correct answer: Male reproductive system- A. Menstruation
- B. Luteal
- C. Ovulation
- D. All of these
Explanation: Menstruation is the phase where the uterine lining sheds, leading to vaginal bleeding.
Correct answer: All of these- A. Day
- B. Week
- C. Month
- D. Year
Explanation: A menstrual cycle usually lasts about a month, although it can vary slightly from woman to woman.
Correct answer: Month- A. Corpus luteum to disintegrate
- B. Follicle to release a mature egg
- C. Uterine lining to detach from the uterus
- D. The lining of the uterus to disintegrate
Explanation: LH surge stimulates the mature follicle to rupture and release the egg during ovulation.
Correct answer: Follicle to release a mature egg- A. Uterine lining thickens
- B. Estrogen level falls
- C. Progesterone level falls
- D. Egg is fertilized
Explanation: If the egg is fertilized, it implants itself into the uterine lining, which becomes thicker and more vascularized to support the growing…
Correct answer: Egg is fertilized460. A zygote is a:
- A. Two-celled embryo
- B. Solid ball of about 50 cells
- C. Blastocyst
- D. Fertilized egg
Explanation: Fertilized egg refers to the initial stage of development when a sperm cell fertilizes an egg cell, forming a single cell known as a…
Correct answer: Fertilized egg