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Human Reproduction Test - 58

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Human Reproduction Test - 58
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  • Question 1
    1 / -0
    Which one of the following character favours the process of normal spermatogenesis in human male?
    Solution
    The sperms are produced in the testes in which the process of spermatogenesis takes place. The temperature of the scrotum is 2-3$$^o$$ C less compared to the body temperature which is necessary for the maintenance of the optimum temperature for spermatogenesis. So, it is necessary that the testes must descend down into the scrotum. 
    Thus, the correct answer is option A. 
  • Question 2
    1 / -0
    An embryonic connective tissue is?
  • Question 3
    1 / -0
    Which is located at the base of urinary bladder?
    Solution
    Seminal vesicle is located at the base of urinary bladder. The seminal vesicles are narrow, long pouches with muscular tissue in their wall, lying between the urinary bladder and rectum. Sugar fructose is present in the secretion of the seminal vesicle. Fructose is an energy source used by sperm. This fluid is known as semen. Sixty percent of semen is produced by seminal vesicles.
  • Question 4
    1 / -0
    Where do sperms get matured?
    Solution
    Epididymis is a mass of coiled tubules attached to the posterior surface of the testes. It stores the sperms temporarily. Sperms achieve maturity and motility in epididymis by reabsorption of fluid secreted originally by the seminiferous tubules and by chemicals produced by the lining of epididymal tube. Thus the correct answer is option C.
  • Question 5
    1 / -0
    Gametogenesis refers to the process of
    Solution
    Gametogenesis refers to the process of male and female gametes production. It takes place in the reproductive organs known as gonads. The male gametes are known as sperm and the female is known as ovum. In female, the process of formation of ovum is known as oogenesis. It takes place in the female gonad known as ovaries. In male, the process of formation of sperm is known as spermatogenesis. It takes place in the male gonad known as testis.
    So, the correct answer is option C.

  • Question 6
    1 / -0
    Correct hormonal sequence in the case of menstrual cycle is  
    Solution
    When the menstrual cycle starts, FSH (Follicle stimulating hormone) is secreted from anterior pituitary which stimulates the development of ovarian follicles upto ovulation. On the 14th day of cycle, there is surge in LH (Luteinizing hormone) levels and this triggers ovulation i.e. release of ovum from the follicle. Ovarian follicles secrete estrogen hormone which stimulates development of secondary sex organs and sexual characters. The ruptured follicle develops into corpus luteum, a yellow body that secretes progesterone hormone required for maintenance of inner lining of uterus.
    So, the correct answer is 'FSH, Estrogen, Progesterone'.
  • Question 7
    1 / -0
    What is the height and weight of twelve weeks old human embryo?
    Solution
    The 12 week embryo in humans has all major organs developed including muscles, bones, toes, fingers and sex organs. It is 7.5 cm long and weighs 14 gm.
  • Question 8
    1 / -0
    Identify the cells found in the wall of seminiferous tubules 
    Solution
    Sertoli cells or nurse cells are large pyramidal cells present in the wall of seminiferous tubules  (germinal epithelium) of human testes. It secretes an androgen-binding protein (ABP) that concentrate testosterone in the seminiferous tubules. These cells also secrete another protein inhibit which suppresses FSH synthesis. It nourishes the developing sperms. Hence, called nurse cells.
    So, the correct answer is option A.

  • Question 9
    1 / -0
    Spermiogenesis means ___________.
    Solution
    Spermiogenesis begins after spermatocytes complete two successive meiotic divisions to produce haploid spermatids. Spermiogenesis means transformation of spermatids into sperm by morphological changes without involving cell division.
    So, the correct option is C.
  • Question 10
    1 / -0
    First menstrual cycle is
    Solution
    • The first menstrual cycle that occurs during puberty at the age of $$11-14$$ years is known as menarche.
    • The last menstrual cycle or cessation of the menstrual cycle at the age of $$45-50$$ years is known as menopause. 
    • Menarche marks the beginning of reproductive life and menopause marks the end of the reproductive cycle.
    Implantation is the attachment of blastocyst to the endometrium of the uterus. It occurs after around 7 days after fertilization.
    • Parturition is the expulsion of the baby from the mother's womb after completion of the gestation period (9 months).

    Hence, the correct option is C.
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