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Human Reproduction Test - 30

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Human Reproduction Test - 30
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  • Question 1
    1 / -0
    The nutritive medium for the ejaculated sperms is given by 
    Solution
    Seminal fluid, i.e., semen contain spermatozoa and is secreted by males. Seminal fluid contains many components apart from spermatozoa like proteolytic enzymes and other enzymes, fructose, ascorbic acid, prostaglandins, etc., and some substances promote the survival of spermatozoa.
    On the other hand, vaginal fluid, uterine lining and fallopian tube are components of female reproductive system.
    Therefore, the correct answer is option A.
  • Question 2
    1 / -0
    Which of the following is the endocrine tissue of testes?
    Solution
    The endocrine gland refers to that gland in an organism that secretes the hormones directly into the circulatory system that needs to be carried to a distant site. Leydig cells, are the cells that secrete the male sex hormone, testosterone directly to the circulatory system. They are located in between the seminiferous tubules within the testes.
    Therefore, the correct answer is option C.
  • Question 3
    1 / -0
    The function of prostate gland is:-
    Solution
    • The prostate gland is a chestnut-shaped gland located between the bladder and penis in males. 
    • Its secretion provides nourishment and protection to the sperms. 
    • The muscles of the prostate gland also help in propelling the seminal fluid into the urethra during ejaculation. 
    • Its secretion forms about one-third of the volume of semen and contain various enzymes, zinc and citric acid. 
    Thus, the correct answer is option B.
  • Question 4
    1 / -0
    In humans, at the end of the first meiotic division, the male germ cells differentiate into
    Solution
    Correct option: D

    Explanation:
    • In humans, at the end of the first meiotic division, the male germ cells differentiate into secondary spermatocytes.
    • The haploid cells formed by second meiotic division of spermatocytes, which develop into a spermatozoa are called spermatids.
    • The undifferentiated male germ cells are called spermatogonia.
    • Primary spermatocytes are diploid cells formed by mitotic division of spermatogonia.
    Thus, Option D is correct.

  • Question 5
    1 / -0
    Cells of Leydig are found in 
    Solution
    Correct option: D

    Explanation:
    • Leydig cells are interstitial cells located adjacent to the seminiferous tubules in the testes. The main function is to produce androgens such as testosterone under the control of Luteinizing hormone.
    • It is a male sex hormone which regulate secondary sexual characters in males.
    • Leydig cells are absent in Testis of frog and are not found in kidneys. They are found in testis of rabbit.
      Thus, Option D is correct.
  • Question 6
    1 / -0
    The mammalian follicle was first described by
    Solution
    Karl Ernst von Baer was the first to discover the egg of the mammal in the ovary.
    Regner de Graaf discovered follicles in the human ovary in 1671 and considered them to be eggs. Since Graaf discovered follicles, they are also called as Graafian follicles.
    Robert Brown named the cell nucleus in 1827.
    Spallanzani was the first to disprove spontaneous generation theory. Thus, the correct answer is option B.
  • Question 7
    1 / -0
    In most mammals, the testes are located in scrotal sac for 
    Solution
    In all mammals, the testes descend into the scrotum, which is outside the body cavity. Here, the temperature is 1-6 degree celsius lower than inside of the body. The germ cells undergo mitosis and forms group of cells which is known as spermatogonia. Spermatogonia is diploid and undergoes mitosis to form primary spermatocyte which further undergoes meiosis to form haploid secondary spermatocyte. The secondary spermatocyte undergoes meiosis II to form haploid spermatids. The spermatids get transformed into spermatozoa by the process of spermiogenesis turns into active sperms.
    So, the correct answer is option A.
  • Question 8
    1 / -0
    Cauda epididymis leads to 
    Solution
    The epididymis is divided into three areas as caput (head), corpus (body) and cauda (tail). Spermatozoa recovered from cauda epididymis are fertile and are capable of motility. The epididymis then leads to vas deferens.
    Vas deferens is the tube that arises from cauda epididymis and reaches upto seminal vesicles.
    Therefore, the correct answer is option B.
  • Question 9
    1 / -0
    Graafian follicle is found in 
    Solution
    Graafian follicle is a mature follicle in a mammalian ovary, that contains a fluid-filled cavity. It gets ruptured during ovulation (release an egg or ovum). Thus, the correct answer is option D.
  • Question 10
    1 / -0
    Stroma is a term applied to 
    Solution
    Stroma of the ovary is a soft tissue, that is supplied with blood vessels, consisting of spindle-shaped cells with small amount of connective tissue in which are embedded the Graafian follicles.
    Thus, the correct answer is option C.
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