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Reproduction System and Embryology Quiz-11

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1.  Bartholin glands are also called
  •  Vestibular glands
  •  Lenticular glands
  •  Rudimentary glands
  •  Does not exist
Solution
(a) Vestibular gland. Greater vestibular glands (Bartholin’s gland) are packed glands situated on each side of vaginal orifice. These glands are homologous to male bulbourethral (Cowper’s) gland and secretes viscus fluid that supplements the lubrication during sexual intercourse. The lesser vestibular glands (paraurethral glands or glands of Skene) are numerous minute glands that are present on either side of the urethral orifice (opening). These glands are homologous to the male prostate glands and secrete mucus

Q2. During oogenesis, the small structure separated from egg is
  •   Polar bodies
  •   Secondary endosperm
  •   Herring bodies
  •   Hela cells
Solution
During maturation phase, each primary oocyte undergoes two maturation divisions, first meiotic and second mitotic. In the first meiotic division, the primary oocyte divides into a large secondary oocyte and small first polar body or polocyte.

Q3.  Which of the correct example of the type of regeneration out of the two major types?
  •  Morphallaxis–regeneration of two transversely cut equal pieces of one Hydra into two small Hydras
  •   Epimorphosis –replacement of old and dead erythrocytes by the now ones
  •   Morphallaxis-healing of wound in the skin
  •   Epimorphosis-regeneration of crushed and filtered out pieces of Planaria into as many new planarian
Solution
Morphallaxis involves the reconstruction of whole body from small fragment by reorganizing the existing cells, e.g., Regeneration of Hydra from its piece.

Q4. 

  •  A-ovulation; B-menstruation
  •   A-ovulation; C-menstruation
  •   C-ovulation; A-menstruation
  •   B-ovulation; D-menstruation
Solution
Ovulation takes place at the 14-16th day of menstrual cycle. This is indicated by arrow C in the diagram. Menstruation is the shedding of endometrium wall of the uterus. It takes place at the 1-5 day of the beginning of menstrual cycle, which is indicated by arrow A

Q5. The organ which produces gametes are called …A… and which neither produces gametes nor hormones are called …B… . Here A and B represent
  •   A-primary sex organs; B-secondary sex organs
  •   A- secondary sex organs; B- primary sex organs
  •   A-tertiary sex organs; B-secondary sex organs
  •   A- secondary sex organs; B- tertiary sex organs
Solution
  A-Primary sex organs; B-Secondary sex organs

Q6.  The new membrane formed by follicular cells is called
  •  Zona granulosa
  •  Zona pellucida
  • Plasma membrane
  •  Tertiary membrane
Solution
The mature ovum or female gamete is spherical in shape. The human ovum is almost free of yolk and said to be alecithal. Its cytoplasm is called ooplasm containing large nucleus. The cytoplasm is enveloped by plasma membrane. Very small cortical granules are present under the plasma membrane. A narrow perivitelline space is present outside the plasma membrane. Just outer to perivitelline space, there is thick non-cellular zona pellucida, secreted by follicular cells. Outer to the zona pellucida there is very thick cellular corona radiate. The latter is formed of radially elongated follicular cells. The side of ovum which extrudes polar bodies is termed animal pole. The opposite side is called vegetal pole. Human ouvm loses its ability to be fertilized about 24 hours after ovulation. In human beings ovum is released from ovary as secondary oocyte

Q7. If for some, reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported form
  •   Epididymis to vas deferens
  •   Ovary to uterus
  •   Vagina to uterus
  •   Testes to epididymis
Solution
Vasa efferentia (Ductuli efferences) are 10-20 fine tubules which connect rete testis with an epididymis (Ductus epididymis). The latter is a pair of ducts from each testis which is formed by union of its vasa efferentia. If the vasa efferentia get blocked, the sperms will not be transported from testis to epididymis.

Q8. In males LH is called
  •   Androgen binding protein
  •  T Inhibin
  •   ICSH (Interstitial Cell Stimulating Hormones)
  •   FSH
Solution
GnRH is secreted by the hypothalamus. It stimulates the anterior lobe of the pituitary gland to secrete LH and FSH. In male LH is known as Interstitial Cells Stimulating Hormone (ICSH) because it stimulates interstitial cells (Leydig’s cells) of the testes to secrete androgens. Testosterone is the principal androgen. FSH stimulates Sertoli cells of the testes to secrete an Androgen Binding Protein (ABP) that concentrates testosterone in the seminiferous tubules. Sertoli cells also secretes a protein hormone called inhibin, which suppresses FSH synthesis. FSH acts directly on spermatogonia to stimulate sperm production.

 


Q9. Leydig’s cells are concerned with
  •   Ovary
  •   Seminiferous tubule
  •   Liver
  •   Pituitary gland
Solution
Leydig’s cells or interstitial cells lie between the seminiferous tubules and secrete the male hormone, testosterone that controls spermatogenesis.

Q10.  Which one of the following systems is not mesodermal in origin?
  •   Circulatory system
  •   Muscular system
  •   Nervous system
  • None of the above
Solution
Nervous system consists of highly specialized cells called the neurons. The neurons defect and receive information from different sensory organs and integrate them to determine the mode of response of the body. Nervous system is ectodermal in origin.

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