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Human Reproduction Test - 71

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Human Reproduction Test - 71
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Weekly Quiz Competition
  • Question 1
    1 / -0
    During menstrual cycle, the cyclic change take place in
    Solution
    The muscular layer of the human uterus is called the myometrium, the glandular layer is the endometrium and the outer layer (serosa) is the perimetrium. During the menstrual cycle, the endometrial tissue thickens due to the formation of blood vessels and cells due to an increase in progesterone. However, if implantation does not take place within two weeks approximately, the hormonal levels drop thus causing shedding of the endometrial tissue, a process of menstruation. 
    Thus, the entire menstrual cycle of nearly 28-30 days involves cyclic changes in the 'Endometrium'.
  • Question 2
    1 / -0
    The hormone which acts on Sertoli cells and stimulate the process of spermiogenesis is
    Solution
    Spermiogenesis is the final stage of spermatogenesis where the spermatids need to mature into motile sperm cells (spermatozoa). The main hormones which regulate spermatogenesis are testosterone and FSH (follicle stimulating hormone) and the Sertoli cells possess receptors for both these hormones. Thus, the Sertoli cells, which nurse the sperm cells in the testes mature when the FSH secreted by the anterior pituitary binds to its receptors.
    So, the correct answer is 'FSH'.
  • Question 3
    1 / -0
    Arrange in correct sequence the structures formed during spermatogenesis.
    (a) Spermatogonia
    (b) Secondary spermatocyte
    (c) Spermatogonial stem cells
    (d) Primary spermatocyte
    (e) Spermatid
    Solution
    Spermatogenesis is the process in which mature haploid sperm cells develop from primordial germ cells. It starts with spermatogonial stem cells at the base of the seminiferous tubules. At first the diploid spermatogonia at the periphery of the seminal canal undergo mitosis and form primary spermatocyte and then secondary spermatocyte. These cells then undergo meiosis to form haploid spermatids and inturn mature to form spermatozoa or sperm cells. Hence, the correct order is 'c-a-d-b-e'.
  • Question 4
    1 / -0
    Spermatozoa not ejaculated are reabsorbed in the
    Solution
    When sperms are ejaculated they are pushed by the rhythmic contractions of the smooth muscles along the vas deferens. However when the sperms are not used or ejaculated the surplus spermatozoa are either voided in the urine or reabsorbed in the epididymis or vas deferens.
    Hence, the correct answer is 'Vas deferens'.
  • Question 5
    1 / -0
    Barr body is absent in normal human female in
  • Question 6
    1 / -0
    Read the following statements 
    1) The male sex accessory ducts include rete testis, vasa efferentia ,epididymis and vas deferens  
    2) Fallopian tube , uterus and vagina constitute the female accessory ducts-
    3) The part of the oviduct closer to the ovary is fimbriae
    4) Isthumus shows a narrow lumen and it joins with the ovary of the above statements
  • Question 7
    1 / -0
    Which gland of male reproductive system provides sugar/fructose for sperm motility?
    Solution
    Seminal vesicle provides sugar/fructose for sperm motility. The male accessory glands include paired seminal vesicles. The seminal vesicles are narrow, long pouches with muscular tissue in their wall, lying between the urinary bladder and rectum. They produce a fluid rich in fructose, an energy source used by sperm. This fluid is known as semen. Sixty percent of semen is produced by seminal vesicles.
    Thus, the correct answer is 'Seminal vesicle'.
  • Question 8
    1 / -0
    Sixty percent of semen is produced by
    Solution
    A major bulk of the semen consists of secretions from the male accessory glands, namely, seminal vesicles, bulbourethral glands and prostate gland. Of these, about sixty per cent of the semen constitutes of amino acids, fructose, citric acid, potassium etc. coming from the seminal vesicles. 
    So the correct option is 'Seminal vesicles'. 
  • Question 9
    1 / -0
    Which of the following depicts the correct pathway of transport of sperms?
    Solution

    Correct answer: B

    Explanation:

    • The sperms are mediated from the rete testis to the epididymis through the efferent ductules.
    • The sperm matures while staying or stored in the epididymis.
    • When synthesized, the mature sperms are transported into the vas deferens through smooth muscle contractions.

    Thus, the proper answer is 'Rete testis → Efferent ductules → Epididymis → Vas deferens.

  • Question 10
    1 / -0
    The function of the secretion of prostate gland is to _______________.
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