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Human Reproduction Test - 27

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Human Reproduction Test - 27
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  • Question 1
    1 / -0
    Spermiogenesis/spermateleosis is formation of spermatozoa from
    Solution
    Spermiogenesis/spermateleosis is formation of spermatozoa from spermatids. It is the last stage of spermatogenesis. It occurs in testis and begins at puberty. The spermatids are transformed into spermatozoa by the process of metamorphosis. Spermatozoa are also known as sperms. After spermiogenesis, the sperm heads become embedded in the Sertoli cells, and are finally released from the seminiferous tubules by the process called spermiation.
  • Question 2
    1 / -0
    Sperm are produced in the 
    Solution
    The main function of seminiferous tubules is to produce sperm, maintain sperm, and store the sperm. During the process of meiosis, the sertoli cells that line the seminiferous tubules undergo the process of differentiation to be converted into sperm. Therefore the correct answer is option A.
  • Question 3
    1 / -0
    The process of formation of ova is called
    Solution
    Oogonia develops into the primary oocytes. In meiosis I the primary oocyte forms a polar body and a secondary oocyte. After meiosis I, the haploid secondary oocyte initiates meiosis II. When meiosis II is completed, an ootid and another polar body is created. Polar bodies degenerate at the end of meiosis II, leaving only the ootid that develops into a mature ovum. Thus the correct answer is option C.
  • Question 4
    1 / -0
    Which of the following constitutes male reproductive system?
    Solution
    • The human male reproductive system consists of the penis, testes, scrotum, seminal vesicles, prostate gland, epididymis and vas deferens. 
    • The prostate gland is a bilobed structure or accessory gland which surrounds the urethra. 
    • The prostate gland joins the vas deferens and releases its secretions in it, which helps increase the mobility of the sperm.
    Thus, the correct answer is option A. 
  • Question 5
    1 / -0
    Menstrual cycle occurs in
    Solution
    Menstrual cycle occurs in female primates. The matured ovum is released from the ovary which is supposed to be fertilized by the sperm. The fertilization is triggered due to the high concentration of progesterone hormone released by the corpus luteum. It also thickens the internal wall of the uterus for implantation. But if the sperm does not fertilize the egg, the corpus luteum degenerates and unfertilized egg along with the endometrium of the uterus is shed off. This shedding of the uterus lining, unfertilized egg and blood is known as the menstrual cycle. 
    So, the correct answer is option A.
  • Question 6
    1 / -0
    Role of Leydig cells is
    Solution
    Role of Leydig cells is the synthesis of testosterone/ Androgens. 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 'Synthesis of testosterone/Androgens'.
  • Question 7
    1 / -0
    Onset of menstrual cycle in female anthropoid primates is known as
    Solution
    Menstruation starts at puberty which is known as menarche. It is the shredding of endometrial lining, ovum and some blood vessels. It ends at the age of 45 to 50 which is known as menopause. It is a cyclic process which happens every month. It includes the menstrual phase, the follicular phase, the ovulatory phase, and the luteal phase. Ovulatory phase happens because of a sudden release of LH hormone.
    so, the correct option is 'Menarche'.
  • Question 8
    1 / -0
    Release of sperms from seminiferous tubules is known as
    Solution
    Spermiation is considered as the process by which mature spermatids are released from Sertoli cells into the seminiferous tubules lumen prior to their passage to the epididymis.
    So the correct option is 'Spermiation'.
  • Question 9
    1 / -0
    One of the following cells secrete hormone
    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. Cells of Leydig 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 'Cells of Leydig'.
  • Question 10
    1 / -0
    Sertoli cells are called
    Solution
    Sertoli cells occur in human testes. Each lobule of testes contains one to three seminiferous tubules in which the sperms are produced. Each seminiferous tubule is lined on its inside by two types of cells called male germ cells (spermatogonia) and sertoli cells. Sertoli cells are also called nurse cells because they provide nutrition to spermatozoa. Spermatozoa are developing sperms. Heads of spermatozoa are embedded in the sertoli cells.
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