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Human Reproduction Test - 77

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Human Reproduction Test - 77
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Weekly Quiz Competition
  • Question 1
    1 / -0
    After birth, colostrum is released from mammary glands which is rich in
    Solution
    After birth, the first milk released by mammary glands is called colostrum. It is released for 2-3 days. It is thin, yellowish fluid containing cells from the alveoli of glandular tissue of mammary glands and is rich in protein, antibodies, but low in fat.
  • Question 2
    1 / -0
    In the development of the human body, the ectoderm is responsible for the formation of __________.
  • Question 3
    1 / -0
    Acrosomal reaction of the sperm occurs due to
    Solution
    When head of sperm binds to zona pellucida of ovum the acrosome release its contents by exocytosis. The content inside acrosome includes various hydrolytic enzymes like hyaluronidase, corona penetrating enzymes, etc. This is called aorosomal reaction. It helps the sperm to reach the plasma membrane of ovum, by dissolving corona radiata and zona pellucida.
  • Question 4
    1 / -0
    Identify the odd one from the following.
    Solution
    Labia minora are paired folds of tissues under Labia majora which in turn surrounds the vaginal opening. Fimbriae, infundibulum and isthmus, along with ampulla are parts of oviduct (or Fallopian tube).
  • Question 5
    1 / -0
    The early stage human embryo distinctly possesses -
    Solution
    Early human embryo possesses a dorsal hollow nerve cord, a well developed notochord and a series of gill slits, which represent the fundamental chordate characters.
  • Question 6
    1 / -0
    In human adult females oxytocin
    Solution
    Correct Option: B
    Explanation:
    • Oxytocin is also called birth hormone because it stimulates the contraction of uterine muscles. 
    • The release of oxytocin by the posterior lobe of the maternal pituitary is induced by stimuli from uterine contractions.
    • The osmoreceptors stimulate the pituitary to secrete vasopressin.
    • Oxytocin is secreted by the posterior pituitary.
    • Estrogen stimulates the growth of mammary glands.
    Hence, in human adult females, oxytocin causes strong uterine contractions during parturition.

  • Question 7
    1 / -0
    Match between the following representing parts of the sperm and their functions and choose the correct option.
    Column AColumn B
    A.Head(i)Enzymes
    B.Middle piece(ii)Sperm motility
    C.Acrosome(iii)Energy
    D.Tail(iv)Genetic material
    Solution
    The sperm can be divided into four parts :
    (i) Head : consists of an elongated haploid nucleus storing genetic material and at tip of the head is acrosome, which consist of various hydrolysing enzymes.
    (ii) Neck : It is very short and consists of two centrioles.
    (iii) Middle piece : It is cylindrical in human sperm and consists of mitochondria, which provides energy for movement of sperm inside female reproductive tract. The energy provided by mitochondria can help sperm survive 1-2 days.
    (iv) Tail : It is long, slender and consists of cytoplasm. It helps in providing sperm with motility.
    So, the correct answer is 'A - (iv), B - (iii), C - (i), D - (ii)'.
  • Question 8
    1 / -0
    In vitro fertilisation is a technique that involves transfer of which one of the following Into the Fallopian tube?
    Solution
    In in vitro fertilisation (IVF) zygote or early embryo upto 8 cell stage is transferred into the Fallopian tube.
  • Question 9
    1 / -0
    The stage between 40-50 years in woman is known as
    Solution
    1. During the age between 40-50 years, women undergo the stage of Menopause. 
    2. Menopause is the period where a woman's body stops menstruating (menstrual cycle). 
    3. Women are born with finite number of eggs in their ovaries. One of each egg is released each month due to which menstrual cycle occurs.
    4. Once all the eggs stored in the ovaries are over, woman stops menstruating and this stage is called menopause.
  • Question 10
    1 / -0
     The male sex hormone testosterone is secreted by
    Solution
    • Testosterone is one of the hormones amongst a group of hormones known as androgens. It is the primary sex hormone produced by males. 
    • Testosterone maintains typically male characteristics of the body (e.g. facial hair). It fulfills important functions for both men and women, most prominently in regulating the sex drive. 
    • In men, testosterone production commences at puberty, when the pituitary gland in the brain begins producing hormones called follicle-stimulating hormone (which primarily stimulates sperm production) and luteinizing hormone (LH). 
    • LH is the hormone that stimulates a man’s testes to produce testosterone. Cells in the testes are called interstitial or leydig cells to produce testosterone in response to the production of LH. Some 95% of a man’s testosterone is produced by leydig cells.
    So, the correct option is 'Leydig cell'.
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