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Human Reproduction Test - 62

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Human Reproduction Test - 62
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Meroblastic segmentation occurs during the development of
    Solution
    Cleavage is the division of cells in the early embryo. Meroblastic cleavage is the type of cleavage in which the cell divides partially. It can be discoidal or superficial. It is usually found in monotremes, birds including pigeons, reptiles and certain fishes and arthropods. 
    So the correct answer is A. 
  • Question 2
    1 / -0
    Amount of yolk and its distribution are changed in the egg. Which one is affected?
    Solution
    Eggs are classified into 3 types namely,  Microlecithal, Alecithal and telolecithal depending on the amount and distribution of yolk which also determines the direction of cleavage
    So, the correct answer is 'Pattern of cleavage'
  • Question 3
    1 / -0
    Type of cleavage in an egg is determined by
    Solution
    Amount and distribution of yolk in egg determines the type of cleavage in an egg during development.
    So the correct answer is 'Amount and distribution of yolk.'
  • Question 4
    1 / -0
    Leydig cells secrete
    Solution
    The region outside the seminiferous tubules in testes is called interstitial spaces. It contains small blood vessels and interstitial cell. These interstitial cells are called Leydig cells. Leydig cells constitute the endocrine tissue of testes. It synthesizes and secretes testicular hormones called androgens. Androgens are a group of male sex hormones, mainly testosterone. 
    Thus, the correct answer is 'Testosterone'.
  • Question 5
    1 / -0
    A female gland corresponding to prostate gland of males is
  • Question 6
    1 / -0
    In mammals, maturation of sperms take place at a temperature
    Solution
    In mammals, maturation of sperms take place at a temperature lower than that of body. For that purpose, testes of mammals are extra-abdominal. The testes are situated outside the abdominal cavity within a pouch called scrotum. The temperature in scrotum necessary for sperm formation should be 2$$^o$$C below body temperature. The slightly cooler temperature of the scrotum is necessary for the development of normal sperm.
    Thus, the correct answer is 'Lower than that of the body'.
  • Question 7
    1 / -0
    At the end of first meiotic division, male germ cell differentiates into
    Solution
    During meiosis-I, primary spermatocyte is the main germ cell. It is diploid, (2n) with 44 + XY (total 46) chromosomes. It completes the first meiotic division (reduction division) leading to the formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each i.e. 22 + X or 22+ Y. So, at the end of first meiotic division, male germ cell differentiates into secondary spermatocyte.
  • Question 8
    1 / -0
    Which of the following is correct?
    Solution
    The gamete formation in females is a cyclic activity that takes about 28/29 days and involves changes in the structure and function of the entire reproductive system. It is called menstrual cycle.
    It occurs only in primates( monkeys, apes and human beings). The latter do not show a cyclic change in sex urge and permit copulation at any time in the menstrual cycle. Human female may accept a male at any time, though there is variation in her level of desire.
    So, the correct answer is 'Menstrual cycle is present in all primates'
  • Question 9
    1 / -0
    What would happen if vasa deferentia of man are cut?
    Solution
    As vas deferentia of man is cut which means that the passage of sperm will be blocked. But as testis are perfectly normal so the process of spermatogenesis will continue normally which means that sperms will be perfectly normal that is they will be nucleated as well as motile. Just semen will be without sperm because semen is formed by prostate bulbourethral and seminal vesicle so semen will be formed but it will be without sperm.
    So, the correct answer is 'Semen is without sperms'.
  • Question 10
    1 / -0
    Enzyme hyaluronidase is synthesised in
    Solution
    • Hyaluronidase enzyme helps in digesting hyaluronan in the corona radiata.
    • This enzyme allows the haploid nucleus of sperm to fertilize with the haploid nucleus of the ovum by breaking down the outer layer of zona pellucida.
    • Acrosome of the sperm contains certain digestive enzymes including hyaluronidase.
    • Golgi bodies of acrosome help in the packaging of proteins.
    • So, the answer is 'Golgi body of acrosome'.
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