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Human Reproduction Test - 95

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Human Reproduction Test - 95
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  • Question 1
    1 / -0
    The female equivalent of the glans of the penis is
    Solution
    The glans is a vascular structure of the clitoris. The clitoris is composed of multiple parts: the glans, the clitoral body, and the paired crura and vestibular bulbs. The glans clitoris is the name of the part that most people call the “clitoris.” It is the external part of the clitoris, about the size of a pea, and is located above the urethra. Because the glans is the most highly innervated area of the clitoris, it’s extremely sensitive to touch.
    So the correct option is 'clitoris'.
  • Question 2
    1 / -0
    Cleavage is a unique form of mitotic cell division in that
    Solution
    In embryology, cleavage is the division of cells in the early embryo. The process follows fertilization, with the transfer being triggered by the activation of a cyclin-dependent kinase complex. The zygotes of many species undergo rapid cell cycles with no significant overall growth, producing a cluster of cells the same size as the original zygote. The different cells derived from cleavage are called blastomeres and form a compact mass called the morula. Cleavage ends with the formation of the blastula.
    So the correct option is 'there is no growth of cells'.
  • Question 3
    1 / -0
    Where does in the human male spermatogenesis occur?
    Solution
    Spermatogenesis is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis. This process starts with the mitotic division of the stem cells located close to the basement membrane of the tubules. These cells are called spermatogonial stem cells. The mitotic division of these produces two types of cells. The primary spermatocyte divides meiotically (Meiosis I) into two secondary spermatocytes; each secondary spermatocyte divides into two equal haploid spermatids by Meiosis II.
    So the correct option is 'testes'.
  • Question 4
    1 / -0
    The hollow ball of cells formed from cleavage is called
    Solution
    The blastula is a hollow sphere of cells, referred to as blastomeres, surrounding an inner fluid-filled cavity called the blastocoel formed during an early stage of embryonic development in animals. Embryo development begins with a sperm fertilizing an egg to become a zygote which undergoes many cleavages to develop into a ball of cells called a morula. Only when the blastocoel is formed does the early embryo become a blastula. The blastula precedes the formation of the gastrula in which the germ layers of the embryo form.
    So the correct option is 'blastula'.
  • Question 5
    1 / -0
    Leydig cells in adult mammals produce
    Solution
    Leydig cells, also known as interstitial cells of Leydig, are found adjacent to the seminiferous tubules in the testicle. They produce testosterone in the presence of luteinizing hormone (LH). Leydig cells are polyhedral in shape, display a large prominent nucleus, an eosinophilic cytoplasm and numerous lipid-filled vesicles. 'Adult'-type Leydig cells differentiate in the post-natal testis and are quiescent until puberty
    So, the correct answer is 'testosterone'
  • Question 6
    1 / -0
    The spermiogenesis is the process by which spermatozoa are formed from
    Solution
    Spermatogenesis is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis. This process starts with the mitotic division of the stem cells located close to the basement membrane of the tubules. These cells are called spermatogonial stem cells. The mitotic division of these produces two types of cells. The spermatids are transformed into spermatozoa(sperm) by the process of spermiogenesis.
    So the correct option is 'spermatid'.
  • Question 7
    1 / -0
    Spermatogenesis in mammalian testes is controlled by
    Solution
    Follicle stimulating hormone is produced by the pituitary gland. It regulates the functions of both the ovaries and testes. In men, the production of follicle stimulating hormone is regulated by the circulating levels of testosterone and inhibin, both produced by the testes. FSH induces Sertoli cells to secrete androgen-binding proteins (ABPs), regulated by inhibin negative feedback mechanism on the anterior pituitary. Specifically, activation of Sertoli cells by FSH sustains spermatogenesis and stimulates inhibin B secretion.
    So the correct option is 'follicle stimulating hormones'.
  • Question 8
    1 / -0
    The immediate predecessors of spermatids are
    Solution
    Spermatocytes are a type of male gametocyte in animals. They derive from immature germ cells called spermatogonia. They are found in the testis, in a structure known as the seminiferous tubules.  Primary and secondary spermatocytes are formed through the process of spermatocytogenesis. The primary spermatocytes are formed when the spermatids undergo mitotic division
    So, the correct answer is 'primary spermatocytes'
  • Question 9
    1 / -0
    Leydig cells in adult mammals produce which one of the following hormones?
    Solution
    Leydig cells present in the testis which are also called as interstitial cells. These cells are present adjacent to seminiferous tubules. The main function of Leydig cells is testosterone in the presence of the luteinizing hormone.
    So the correct option is 'Testosterone'
  • Question 10
    1 / -0
    Polar bodies
    Solution
    The cell that results from the asymmetric division of an oocyte is a polar body. In animals and humans, polar bodies are produced after every meiotic division. They are relatively smaller in size due to less cytoplasm compared to the gametocyte that will become the ovum. This is essential so that much of the cytoplasm is available and the chromosomal content is halved at the time of fertilization. The polar bodies will eventually degenerate.
    So the correct option is 'allow a reduction in chromosomes while preserving all the food for one egg'.
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