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Human Reproduction Test - 67

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Human Reproduction Test - 67
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  • Question 1
    1 / -0
    Which is correctly matched?
    Solution
    Menstrual cycle starts with menstrual flow followed by follicular phase. During follicular phase levels of gonadotropins (LH and FSH) increase and estrogen levels also increase. This lead to rapid secretion of LH and LH surge is attained and hence ovulation takes place. After ovulation remains of Graafian follicle turns into Corpus luteum which secretes large amounts of progesterone.

    So, the correct option is ' Development of Corpus luteum. Secretory phase and increased secretion of progesterone'.
  • Question 2
    1 / -0
    Accessory glands associated with genital organs of female are
    (a) Vestibular or Bartholin's
    (b) Cowper's
    (c) Ampullary
    (d) Vesicular
    Solution
    The female external genitalia contains vulva, Bartholin's gland, and clitoris. Further vulva contains mons pubis, labia majora, and labia minora. Bartholin's gland help in lubrication of vagina and clitoris is a tiny finger-like structure which helps in stimulation.
    So, the correct option is 'a only'.
  • Question 3
    1 / -0
    In human, the unpaired male reproductive structure is
    Solution
    In human the unpaired male reproductive structure is prostate. It is the accessory genital gland which occurs only in male mammal. It is located below the urinary bladder. It secretes an alkaline fluid. This fluid is rich in bicarbonate ion that neutralizes the acids in the female reproductive tract. Prostate gland produces a secretion for stimulating sperm activity. This secretion is called semen or seminal fluid.
  • Question 4
    1 / -0
    Menstrual phase is followed by
    Solution
    Menstrual cycle starts with the menstrual flow (menses), this is followed by follicular phase. During this phase secretion of gonadotropins  (LH and FSH) and estrogens. In the middle of the cycle, rapid secretions of LH and FSH increases leading to LH surge and hence ovulation. Ovum lasts for 24 hours only. It is followed by the luteal phase during which the remaining parts of Graafian follicle changes into corpus luteum.
    So, the correct option is 'Follicular phase'.
  • Question 5
    1 / -0
    Which gland secretes alkaline mucus in urethra to neutralise the acidity of urine?
    Solution
    A pair of exocrine glands known as Cowper's gland. They are situated lateral to the urethra in the male reproductive system. They help in lubrication of penis and secretes an alkaline mucus which is known as pre-ejaculate. This also helps in the neutralization of acidity of urine.
    So, the correct option is 'Cowper's gland'.
  • Question 6
    1 / -0
    Epididymis lies between
    Solution
    The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens. The seminiferous tubules of testis open into Vasa efferentia through rete testis. The vasa efferentia leave the testis and open into epididymis located along the posterior surface of each testis. The epididymis leads to vas deferens that ascends to the abdomen and loops over the urinary bladder.
    so, the correct option is 'Vas deferens and vasa efferentia'.
  • Question 7
    1 / -0
    Primary spermatocyte differs from spermatogonium in
    Solution
    Primary spermatocyte differs from spermatogonium in size and volume. In testis, the immature male germ cells, spermatogonia produce sperms by a process called spermatogenesis that begins at puberty. It occurs in four stages. During the first step of spermatogenesis, i.e. spermatocytogenesis, the spermatogonia present on the inside wall of the seminiferous tubules multiply by mitotic division and increase in numbers. Each spermatogonia is diploid containing 46 chromosomes. When spermatogonia accumulate a large amount of nutrient and chromatin material and increases in size, it is known as primary spermatocytes. It periodically undergoes meiosis and others remain as spermatogonia cells. A primary spermatocyte is diploid, (2n) with 44+XY (total 46) chromosomes.
    So, the correct answer is 'Size and volume'.
  • Question 8
    1 / -0
    Vasa efferentia lead from
    Solution
    The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens. The seminiferous tubules of testis open into Vasa efferentia through rete testis. The vasa efferentia leave the testis and open into epididymis located along the posterior surface of each testis. The epididymis leads to vas deferens that ascends to the abdomen and loops over the urinary bladder.
    So, the correct option is 'Rete testis to vas deferens'.
  • Question 9
    1 / -0
    Radial cleavage is found in
    Solution
    Radial cleavage is considered as the holoblastic cleavage that is typical of deuterostomes and that is characterized by the arrangement of the blastomeres of each upper tier directly over those of the next lower tier resulting in radial symmetry around the pole to pole axis of the embryo makes a 90-degree angle. It is found in cnidaria or Coelenterata and echinoderms.
    So the correct option is 'Coelenterates'.
  • Question 10
    1 / -0
    Which type of germ cells contain 23 chromosome?
    Solution
    The spermatogonia present on the inside wall of seminiferous tubules multiply by mitotic division and increase in number. Each spermatogonium is diploid and contains 46 chromosomes. Some of the spermatogonia called primary spermatocytes periodically undergo meiosis. A primary spermatocyte completes its first meiotic division and forms two equal haploid cells called secondary spermatocyte which has only 23 chromosomes each.
    So, the correct option is 'secondary spermatocyte'.
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