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Human Reproduction Test - 34

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Human Reproduction Test - 34
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  • Question 1
    1 / -0
    Bartholin's glands are situated ?
    Solution
    Correct Answer: C
    Explanation:
    • Bartholin's glands are located on either side of the vaginal opening and secrete a fluid that assists in vaginal lubrication.
    Hence, Bartholin’s glands are located on either side of the vagina in humans.  
     

  • Question 2
    1 / -0
    Which of the following is the correct matching of the events occurring during menstrual cycle ?
    Solution
    Answer: (D) Development of corpus luteum - Secretory phase and increased secretion of progesterone.
    Explanation:
    • The female reproductive cycle is classified into 4 phases respectively:
                             1. Menstrual phase
                             2. Follicular phase
                             3. Ovulatory phase
                             4. Luteal phase
    • During the menstrual phase breakdown of the endometrium occurs when the ovum is not fertilized.
    • In the follicular/proliferative phase, the griffian follicle starts to develop. Rapid regeneration of the endometrium occurs.
    • After that, due to LH surge, the matured graffian follicle releases the ovum marking the ovulatory phase.
    • After ovulation, the graffian follicle takes the shape of corpus luteum which secretes the progesterone hormone. This phase is called as the luteal or secretory phase.
    Hence option (D) is the correct matching of the event occurring during menstruation of human females.
  • Question 3
    1 / -0
    Which of the following is not the case of epimorphosis?
    Solution
    Epimorphosis is the proliferation of new cells from the surface of the wounded or severed body parts. Here, new growth is seen as in case of healing of wound, regeneration of lost parts in lizards or salamander.
    Formation of sperms from small clumps cannot be a case of restorative regeneration.
    Thus, the correct answer is option A.
  • Question 4
    1 / -0
    A change in the amount of yolk and its distribution in the egg will effect :
  • Question 5
    1 / -0
    Which part of the ovary in mammals acts as an endocrine gland after ovulation 
    Solution
    Correct option: B

    Explanation:
    • After ovulation, the graffian follicle matures into corpus luteum and acts as an endocrine gland. It secretes luteinizing hormone, follicle stimulating hormone, oestrogen and progesterone. 
    • Vitelline membrane is an enveloped structure surrounding the outer surface of the plasma membrane in an ovum.
    • The supportive framework of an organ is called stroma.
    • The germinal epithelium is the epithelium layer of seminiferous tubules (testis) in males and ovarian surface (ovary) in females.
      Thus, option B is correct.
  • Question 6
    1 / -0
    The correct sequence of organs in the male reproductive system for transport of sperms is
    Solution
    Vas deferens is the tube that connects the testes with the urethra. The vas deferens is a coiled duct that conveys sperm from the epididymis to the ejaculatory duct and the urethra. Vas deferens is the duct that conducts sperms from testis to body cavity. Ureters are the ducts that transfer urine from kidneys to urinary bladder. Urethra is the common duct for transfer of urine and sperms in males, it arises from urinary bladder and opens to outside. 
    Therefore, the correct answer is option A.
  • Question 7
    1 / -0
    Ovulation in female human beings stops approximately around the age of
    Solution
    Ovulation is the process when a mature egg is released from the ovary. Then the egg is pushed down the Fallopian tube and is available to be fertilized. In females, ovulation continues after the age of 45-50 after which eggs are not released from the ovary and there is menopause.
    Thus, the correct answer is option (A), '45-50'.
  • Question 8
    1 / -0
    Tunica albuginea is the covering around ________.
    Solution
    • Tunica albuginea is the tough fibrous layer of connective tissue that surrounds the corpora cavernosa of the penis. It helps to trap blood in the corpora cavernosa. It is a dense layer of tissue that encases the testes and connects to the layers of fibres that surround the epididymis, the first in a series of ducts that transport sperm out of the testes and into the penis. 
    • Tunica albuginea (ovaries), is a layer of condensed fibrous tissue on the surface of the ovary.
    • The renal capsule surrounds the outer surface of both kidneys.
    Thus, the correct answer is option D.
  • Question 9
    1 / -0
    The future development of the embryo that would take place after it gets embedded in the uterus is
    Solution
    Once the egg and sperm has united, it results in the formation of zygote.
    The zygote undergoes multiple divisions to form blastula, which gets embedded in the uterus. Now, the embryo undergoes process of gastrulation, forming the three germ layers as the endoderm, mesoderm and ectoderm. Next, placenta develops. Mesoderm also combines with trophoblast tissue to from the umbilical cord, which transports nutrients and wastes between fetal circulation and the placenta.
    Last part is where the embryo acquires human appearance and then it grows.
    Thus, the correct answer is option A.
  • Question 10
    1 / -0
    If the .......... in the male is blocked, sperms can be prevented to .......... the egg.
    Solution
    When the male vasa deferentia are blocked, it prevents the sperm from entering into the seminal glands or the ejaculate (semen). No sperms in the semen means no fertilization with the egg. This process of blocking vas deferens is a means of birth control which is called vasectomy. Thus, the correct answer is option A.
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