CHAPTER- 2: HUMAN REPRODUCTION
EXERCISES
1. Fill in the blanks:
(a) Humans reproduce _____________ (asexually/sexually)
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(b) Humans are _____________ (oviparous, viviparous, ovoviviparous)
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(c) Fertilisation is _____________ in humans (external/internal)
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(d) Male and female gametes are _____________ (diploid/haploid)
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(e) Zygote is _____________ (diploid/haploid)
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(f) The process of release of ovum from a mature follicle is called
_____________
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(g) Ovulation is induced by a hormone called _____________
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(h) The fusion of male and female gametes is called _____________
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(i) Fertilisation takes place in _____________
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(j) Zygote divides to form _____________which is implanted in uterus.
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(k) The structure which provides vascular connection between foetus
and uterus is called _____________
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2. Draw a labelled diagram of male reproductive system.
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3. Draw a labelled diagram of female reproductive system.
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4. Write two major functions each of testis and ovary.
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5. Describe the structure of a seminiferous tubule.
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6. What is spermatogenesis? Briefly describe the process of spermatogenesis
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7. Name the hormones involved in regulation of spermatogenesis.
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8. Define spermiogenesis and spermiation.
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9. Draw a labelled diagram of sperm.
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10. What are the major components of seminal plasma?
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11. What are the major functions of male accessory ducts and glands?
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12. What is oogenesis? Give a brief account of oogenesis.
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13. Draw a labelled diagram of a section through ovary.
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14. Draw a labelled diagram of a Graafian follicle?
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15. Name the functions of the following:
(a) Corpus luteum (b) Endometrium
(c) Acrosome (d) Sperm tail
(e) Fimbriae
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16. Identify True/False statements. Correct each false statement to make
it true.
(a) Androgens are produced by Sertoli cells. (True/False)
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(b) Spermatozoa get nutrition from Sertoli cells. (True/False)
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(c) Leydig cells are found in ovary. (True/False)
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(d) Leydig cells synthesise androgens. (True/False)
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(e) Oogenesis takes place in corpus luteum. (True/False)
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(f) Menstrual cycle ceases during pregnancy. (True/False)
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(g) Presence or absence of hymen is not a reliable indicator of virginity
or sexual experience. (True/False)
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17. What is menstrual cycle? Which hormones regulate menstrual cycle?
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18. What is parturition? Which hormones are involved in induction of parturition?
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19. In our society the women are often blamed for giving birth to daughters.
Can you explain why this is not correct?
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20. How many eggs are released by a human ovary in a month? How many
eggs do you think would have been released if the mother gave birth to
identical twins? Would your answer change if the twins born were
fraternal?
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21. How many eggs do you think were released by the ovary of a female dog
which gave birth to 6 puppies?
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