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Home » » 12TH BIO ZOOLOGY UNIT WISE FREE ONLINE TESTS | CHAPTER 2 HUMAN REPRODUCTION | INTERNAL MCQ | ENGLISH MEDIUM.

12TH BIO ZOOLOGY UNIT WISE FREE ONLINE TESTS | CHAPTER 2 HUMAN REPRODUCTION | INTERNAL MCQ | ENGLISH MEDIUM.

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12TH BIO ZOOLOGY UNIT WISE FREE ONLINE TESTS | CHAPTER 2 HUMAN REPRODUCTION | INTERNAL MCQ | ENGLISH MEDIUM.

12TH BIO ZOOLOGY UNIT WISE FREE ONLINE TESTS | CHAPTER 2 HUMAN REPRODUCTION | INTERNAL MCQ | ENGLISH MEDIUM.

1. The human reproductive system is essential for the...

2. The process of formation of gametes (sperms and ova) is called:

3. The primary male sex organs are the:

4. The scrotum acts as a thermoregulator, maintaining a temperature _______ than the normal body temperature for spermatogenesis.

5. The site of sperm production within the testes is the:

6. Which cells in the seminiferous tubules provide nourishment to the sperms till maturation?

7. Testosterone is secreted by:

8. The failure of testes to descend into the scrotal sacs is known as:

9. The duct that stores spermatozoa temporarily and where they undergo physiological maturation is the:

10. Which accessory gland secretes an alkaline fluid containing fructose sugar?

11. The primary female sex organs that produce the ovum are the:

12. The finger-like projections at the end of the fallopian tube that help in collecting the ovum after ovulation are called:

13. The inner glandular layer of the uterus that undergoes cyclic changes during the menstrual cycle is the:

14. Which layer of the uterus exhibits strong contractions during parturition?

15. The Bartholin's glands in females are homologous to which glands in males?

16. The cells of which part of the mammary gland secrete milk?

17. Spermatogenesis is the process that produces:

18. In spermatogenesis, primary spermatocytes are:

19. The transformation of spermatids into mature spermatozoa is called:

20. Which hormone from the hypothalamus initiates spermatogenesis at puberty?

21. The cap-like structure at the tip of the sperm head, containing proteolytic enzymes, is the:

22. The middle piece of the sperm contains spirally twisted mitochondria, which provide:

23. Oogenesis begins:

24. A mature ovarian follicle is known as a:

25. The outer thick coat of follicular cells surrounding the ovum is called:

26. The menstrual cycle typically lasts for approximately:

27. Menstrual flow is due to the breakdown of which layer?

28. The rupture of the Graafian follicle and release of the ovum is called:

29. The sharp peak of which hormone, known as a 'surge', triggers ovulation?

30. After ovulation, the remaining part of the Graafian follicle transforms into the:

31. Which hormone is essential for the maintenance of the endometrium during the luteal phase?

32. In the absence of fertilization, the corpus luteum degenerates and leaves a scar tissue called:

33. The permanent cessation of ovulation and menstruation in a woman's life is called:

34. Fertilization in humans normally occurs in the:

35. The acrosomal reaction helps the sperm to penetrate the:

36. The formation of a fertilization membrane around the ovum prevents:

37. After fertilization, the zygote undergoes rapid mitotic divisions, a process called:

38. A berry-shaped cluster of 16 or more cells formed after fertilization is called the:

39. The attachment of the blastocyst to the uterine wall is called:

40. The inner cell mass of the blastocyst develops into the:

41. An implantation outside the uterus is known as:

42. Identical twins are also known as:

43. The transformation of the blastocyst into a gastrula with three primary germ layers is called:

44. Which extra-embryonic membrane provides a buoyant environment to protect the developing embryo?

45. The outermost extra-embryonic membrane that helps in the formation of the placenta is the:

46. The placenta connects the foetus to the uterine wall through the:

47. The central nervous system (brain and spinal cord) develops from which primary germ layer?

48. Muscles, cartilage, and bone arise from which primary germ layer?

49. The average duration of human pregnancy, or the gestation period, is:

50. Which hormone is produced only during pregnancy?

51. The process of giving birth to the baby is called:

52. The neurohumoral reflex that initiates the secretion of oxytocin for childbirth is called:

53. Which hormone promotes parturition by relaxing the pelvic joints and dilating the cervix?

54. The production of milk by mammary glands is called:

55. The nutrient-rich, yellowish fluid produced by the mother immediately after giving birth is called:

56. Colostrum is particularly rich in which type of antibodies?

57. Which hormone causes the "Let-Down" reflex for the ejection of milk?

58. The first meiotic division of a primary oocyte results in a large secondary oocyte and a small:

59. The terminal portion of the male reproductive system that conveys both urine and semen is the:

60. The enlarged end of the penis is called the:

61. The follicular phase of the menstrual cycle is also known as the:

62. The enzyme hyaluronidase, found in the acrosome, is also known as:

63. The process where the sperm undergoes a biochemical event to become capable of fertilization is called:

64. The first cleavage of the zygote produces two identical cells called:

65. Fraternal twins are produced from:

66. The epithelium of the gastrointestinal and respiratory tract arises from which germ layer?

67. The embryo's heart develops and begins to circulate blood during which week of pregnancy?

68. The placenta, along with the remains of the umbilical cord, expelled after delivery is called:

69. Sertoli cells also secrete inhibin, a hormone involved in:

70. The wider central portion of the fallopian tube is the:

71. The cervical canal along with the vagina forms the:

72. The Skene's glands in females are homologous to which gland in males?

73. The pigmented area surrounding the nipple is called the:

74. One primary spermatocyte undergoes meiosis to produce how many haploid spermatids?

75. The release of sperms from the seminiferous tubules is called:

76. At puberty, only about how many follicles are left in each ovary?

77. The fluid-filled space that develops in a tertiary follicle is the:

78. The human ovum is described as:

79. Absence of menstruation can be an indicator of pregnancy but could also be due to:

80. The luteal phase of the menstrual cycle is also known as the:

81. What is the condition with many partially formed follicles on the ovaries, leading to irregular cycles and other symptoms?

82. The adhesive cementing substance holding follicular cells together is:

83. The blastocyst is composed of an outer layer called the trophoblast and an inner group of cells called the:

84. Which extra-embryonic membrane is the source of the earliest blood cells and blood vessels?

85. The first trimester of pregnancy is the main period of:

86. Weak uterine contractions that can lead to "false labour" are called:

87. A surgical incision in the abdomen and uterus to deliver a baby is known as a:

88. The whole process of spermatogenesis takes about how many days?

89. Which pituitary hormone stimulates testicular growth and the production of Androgen Binding Protein (ABP)?

90. For normal fertility, it is estimated that at least what percentage of sperms must show vigorous motility?

91. The secondary oocyte completes its second meiotic division:

92. The narrow space between the vitelline membrane and the zona pellucida of an ovum is the:

93. The first menstruation which begins at puberty is known as:

94. The main period of organogenesis during pregnancy is the:

95. The hormone that plays a major role in lactogenesis (milk production) is:

96. Which structure links the embryo to the placenta and eventually becomes part of the urinary bladder?

97. The inner cell mass of the blastula differentiates into epiblast and:

98. The transfer of sperms by the male into the female genital tract is called:

99. The proximal centriole of the sperm plays a role in the:

100. By the end of which trimester is the foetus fully developed and ready for delivery?

101. The fusion of male and female gametes to form a zygote is called:

102. The rapid mitotic divisions of the zygote that convert it into a multicellular structure is known as:

103. The intimate connection between the foetus and the uterine wall of the mother for exchange of nutrients is the:

104. The outermost fibrous covering of each testis is called:

105. Approximately how many lobules is each testis divided into?

106. The coagulating enzyme found in the fluid secreted by seminal vesicles is called:

107. The ovarian ligament that attaches the ovary to the pelvic wall and uterus is called:

108. The rounded region of the uterus superior to the entry of the uterine tubes is the:

109. The thin ring of tissue that may partially close the external opening of the vagina is the:

110. Which structure in the mammary gland serves as a reservoir of milk?

111. A human male typically ejaculates about how many sperms during coitus?

112. The cytoplasm of the human ovum is called:

113. The large nucleus within the human ovum is called the:

114. Which phase of the menstrual cycle extends from the 5th day of the cycle until the time of ovulation?

115. The average age for menopause to occur in women is:

116. Conjoined twins who are joined during birth are also known as:

117. The three primary germ layers (ectoderm, mesoderm, endoderm) are formed during which process?

118. The hormone hCS, produced during pregnancy, is also known as:

119. The placenta and the remains of the umbilical cord expelled from the uterus after delivery are collectively called:

120. World Breastfeeding Week (WBW) is organized during which part of the year?

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