1000+ Human reproductive system Multiple Choice Question Answer [Solved]

1. Immediately after ovulation, the ovum is covered by a membrane called
A. Chorion
B. Zona pellucida
C. Corona radiata
D. Vitelline membrane
Answer : B

2. Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoan in the testis?
A. 7 days
B. 70 days
C. 7 months
D. 70 hours
Answer : B

3. Highly sophisticated procedure of injecting sperm directly into the ovum is
A. GIFT
B. ZIFT
C. ICSI
D. IUI
Answer : C

4. In ectopic pregnancy, foetus grows in ...
A. Vagina
B. Fallopian tube
C. Uterus
D. Body cavity
Answer : B

5. Cryptorchidism is ...
A. Nondescent of testes in scrotum
B. Nondevelopment of testes
C. Removal of scrotum
D. Breaking connection of vas deferens
Answer : A

6. Cell division that occurs in zygote is called
A. meiosis
B. Mitosis
C. Cleavage
D. Differentiation
Answer : C

7. The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the:
A. Capacitor
B. Head
C. Corona
D. Acrosome
Answer : D

8. Pregnancy test is confirmed by the presence of
A. Prolactin in urine
B. Relaxin in urine
C. H c g in urine
D. Fsh and lh in urine
Answer : C

9. Mammary glands are modification of ...
A. Sebaceous glands
B. Sweat glands
C. Meibomian glands
D. None of the above
Answer : B

10. Acrosome of sperm contains ...
A. Hyaluronidase and acrosin
B. Hyaluronic acid and acrosin
C. Hippuric acid and uric acid
D. Testosterone
Answer : A

11. Human embryo is enclosed by a sac called
A. Scrotum
B. Ericardium
C. Placenta
D. Amniotic sac
Answer : D

12. Fimbriae of fallopian tube ...
A. Release ovum from graffian follicle
B. Cause endometrial changes for implantation
C. Help develop corpus luteum
D. Help collection of ovum after ovulation
Answer : D

13. Which one is not the function of human placenta
A. Helps co2 and excretory products pass from foetus to mother's body
B. Helps o2 and nutrients from mother's body enter the foetus
C. Secretes hormones
D. It protects foetus from mechanical shocks
Answer : D

14. Villi of human placenta develop from ..
A. Chorion
B. Allantois
C. Yolk sac
D. Amnion
Answer : A

15. Number of chromosomes in secondary oocyte stage in humans is ...
A. 23
B. 46
C. 18
D. 20
Answer : A

16. After fertilization, implantation of human embryo takes place on
A. 10 th day
B. 14 th day
C. 7 th day
D. 3 rd day
Answer : C

17. Corona radiata is held by...
A. Mucopolysaccharide
B. Oligosaccharide
C. Lipopolysaccharide
D. Lipoprotein
Answer : A

18. Decreased motility of sperm <40 % is known as
A. Azoospermia
B. Oligospermia
C. Asthenozoospermia
D. Necrozoospermia
Answer : C

19. Acrosome occurs in the sperm in
A. Tail part
B. Behind the nucleus
C. Middle piece
D. Tip
Answer : D

20. Hormones that control the growth and maturation of graffian follicle is
A. FSH - LH
B. FSH - ICSH
C. ACTH - LH
D. GH - ADH
Answer : A

21. Human placenta is
A. Endothelial
B. Haemochorial
C. Epitheliochorial
D. Syndesmochorial
Answer : B

22. Temperature in scrotum necessary for sperm formation is usually ...
A. 2°c above body temperature
B. 2° c below body temperature
C. 4°c above body temperature
D. 4° c below body temperature
Answer : B

23. Pregnancy begins with implantation of
A. Embryo
B. Fertilized ovum
C. Blastopore
D. Blastocyst
Answer : D

24. Albinism is a congenital disorder resulting from the lack of which enzyme?
A. Tyrosinase
B. Xanthine oxidase
C. Catalase
D. Fructokinase.
Answer : A

25. Which one takes part in formation of placenta? ...
A. Only trophoblast
B. Only allantois
C. Trophoblast and mesoderm
D. Trophoblast and mesoderm and allantois
Answer : D

26. Which of the following statements is most correct about the human menstrual cycle.
A. The menstrual cycle in all women is a 28 day cycle
B. Ovulation always occurs at the midpoint of the menstrual cycle
C. A high body temperature indicates ovulation is occurring
D. The menstrual cycle is an endocrine cycle regulating reproductive physiological changes
Answer : D

27. Prostate gland produces a secretion for ...
A. Attracting sperms
B. Stimulating sperm activity
C. Inhibiting sperm activity
D. None of the above
Answer : B

28. Correct sequence in embryonic development is ..
A. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula
B. Fertilization -> zygote -> cleavage -> blastula -> morula -> gastrula
C. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula
D. Fertilization -> zygote -> gastrulae -> morula -> blastula -> cleavage
Answer : A

29. When there is no fertilization, the corpus luteum ...
A. Stops secreting progesterone
B. Changes to corpus albicans
C. Starts producing progesterone
D. Begins next cycle
Answer : B

30. Third phase of embryo development is ...
A. Cleavage
B. Fertilization
C. Gametogenesis
D. Gastrulation
Answer : D

31. Human female reaches menopause at the age of about ...
A. 25 years
B. 35 years
C. 50 years
D. 70 years
Answer : C

32. In uterus, endometrium proliferates in response to ...
A. Relaxin
B. Oxytocin
C. Progesterone
D. Oestrogen
Answer : D

33. Part of sperm that passes into ovum is
A. Tail
B. Acrosome
C. Head
D. Head, neck and middle piece
Answer : D

34. What happens during fertilization when many sperms reach close to ovum ....
A. Cells of corona radiata trap all the sperm except one
B. Only two sperms nearest to ovum penetrate zona pellucida
C. Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
D. All sperms except the one nearest to ovum lose their tails
Answer : C

35. Which layer of embryo is formed first
A. ectoderm
B. Mesoderm
C. Endoderm
D. Mesenchyma
Answer : C

36. Thick layer which surrounds the ovum is ...
A. Zona pellucida
B. Membrana granulosa
C. Corona radiata
D. Theca interna
Answer : A

37. The three primary germ layers, ectoderm, endoderm and mesoderm are differentiated during
A. Blastulation
B. Neurulation
C. Gastrulation
D. Organogenesis
Answer : C

38. Haemophilic man marries a normal woman. Their off springs will be
A. All haemophilic
B. All boys haemophilic
C. All girls haemophilic
D. All normal
Answer : D

39. Emergency contraceptives may prevent pregnancy if used within 72 hrs of
A. Menstruation
B. Fertilization
C. Ovulation
D. Coitus
Answer : D

40. Identical twins are also known as ..
A. monozygotic twins
B. Dizygotic twins
C. Fraternal twins
D. Zygotic twins
Answer : A

41. Layers of ovum from outside to inside are .
A. Corona radiata, zona pellucida, vitelline membrane
B. Zona pellucida, corona radiata, vitelline membrane
C. Vitelline membrane, zona pellucida, corona radiata
D. Zona pellucida, vitelline membrane, corona radiate
Answer : A

42. The first milk which comes out just after child birth is known as .
A. Colostrum
B. Prolactin
C. Hind milk
D. Lactogen
Answer : A

43. Fertility in women may be impaired by
A. Hypertension
B. Gall stones
C. Obesity
D. Short stature
Answer : C

44. Epididymis is ...
A. A long coiled tube between vasa efferentia and vas deferens
B. Network of sinuses between seminiferous tubules and efferentia
C. Connection between vas deferens and seminal vesicle
D. Intermediate structure between the testis and vasa efferentia
Answer : A

45. Which one occurs first in the human embryo
A. Neurogenesis
B. Cardiogenesis
C. Hepatogenesis
D. Osteogesis
Answer : A

46. Pregnancy can be detected as early as on
A. 28 th day of cycle
B. 8th week
C. 40 th day of the cycle
D. 10 th week
Answer : A

47. Forensic investigation of rape case focuses on the presence of fructose in female reproductive system, the only part of the human body producing fructose is
A. Cowper's gland
B. Prostate gland
C. Testes
D. Seminal vesicle
Answer : D

48. Membrane that gives protection to embryo from external shocks is
A. Amnion
B. Allantois
C. Chorion
D. Placenta
Answer : A

49. Combined Oral contraceptives prevent pregnancy by
A. Tubal block
B. Preventing spermatogenesis
C. Forming a barrier between the ovum and sperm
D. Suppressing ovulation
Answer : D

50. Erythroblastosis foetalis is caused by fertilization between the gametes of
A. Rh -ve female and rh+ ve male
B. Rh+ ve female and rh -ve male
C. Rh+ ve female and rh+ ve male
D. Rh~ ve female and rh -ve male
Answer : A