Reproduction system and Embryology Quiz-15

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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. During embryonic development, endoskeleton and muscle develop from which germinal layer?
  •  Ectoderm
  •  Endoderm
  •  Mesoderm
  •  Blastopore
All systems (except nervous system, gills and lungs), muscles, bone, heart, blood, kidney, reproductive system, coelom, lymph node, spleen, eustachian tube, adrenal cortex develop from mesoderm.

Q2. Spermiogenesis or spermatiliosis is
  •  Changing of spermatid to spermatozoa
  •  Changing of spermatid to sperm
  •  Both (a) and (b)
  •  Changing of spermatid to secondary spermatocytes
The transformation of spermatids into spermatozoa is called spermiogenesis or spermateliosis. The spermatids are later on known as sperms. After spermiogenesis head becomes embedded in the Sertoli cells and are finally released from the seminiferous tubules by process called spermiation

Q3. Oral contraceptives are prescribed in females to check
  •  Entry of sperms in vagina
  •  Implantation
  •  Ovulation
  •  Fertilization
Oral contraceptive is a preparation consisting of one or more synthetic female sex hormones taken by woman to prevent conception. Most oral contraceptives are combined pills consisting of an oestrogen, which blocks the normal process of ovulation and progesterone, which acts on the pituitary gland to block the normal control of menstrual cycle.


  •  A-Secondary oocyte, B-Oogonia, C-Primary oocyte
  •  A- Oogonia, B- Primary oocyte, C- Secondary oocyte
  •  A-Secondary oocyte, B- Primary oocyte, C- Oogonia
  •  A- Oogonia, B- Secondary oocyte, C-Primary oocyte
A-Oogonia-46 chromosomes, B-Primary oocyte-46 chromosomes, C-Secondary oocyte-23 chromosomes

Q5.Select the correct statement
  •  Cleavage follows gastrulation
  •  Yolk content in egg has no role in cleavage
  •  Cleavage is repeated mitotic division of zygote
  •  Gastrulation and blastulation are followed by each other
 Fertilized zygote is divided by special type of mitotic divisions, known as cleavage. Cleavage increases the number of cells.

Q6. Uterine endometrium, epithelial glands and connective tissue are broken in menstrual phase. This is due to
  •  Over secretion of FSH
  •  Lack of oestrogen
  • Lack of progesterone
  •  Over production of progesterone
Due to lack of progesterone, uterine endmetrium, epithelial glands and connective tissue are broken in menstrual cycle

Q7.Which part of the sperm contains hydrolytic enzymes?
  •  Head region
  •  Neck region
  •  Cap region
  •  Tail region
Acrosome contains hyaluronidase proteolytic enzymes, which is popularly known as sperm lysin as it is used to penetrate egg (ovum) at the time of fertilisaton

Q8.The main function of the fimbriae of the fallopian tube in females is to
  •  Release to ovum from the graafian follicle
  •  TMake necessary changes in the endometrium for implantation
  •  Help in the development of corpus luteum
  •  Help in the collection of the ovum after ovulation
The part of the fallopian tubes (oviducts) closer to the ovary is the funnel-shaped infundibulum. The edges of the infundibulum possess finger-like projections called fimbriate, which help in collection of the ovum after ovulation.

Q9. In frog, gastrulation process involves
  •  Epiboly
  •  Emboly
  •  Invagination
  •  All of theses
Gastrulation is the process of the formationof gastrula from the blastula. It is characterized y formation of three primary germ layers and morphogenetic movements including epiboly, emboly, involution, invagination and delamination.

Q10. Luteal phase is also called
  •  Secretory phase
  •  Bleeding phase
  •  Menses phase
  • Ovulatory phase
Luteal phase is also called secretory phase. Generally, menstrual cycle have four phases (i) Menstrual phase (a) The soft tissue of endometrial lining of the uterus disintegrates causing bleeding. (b) The unfertilized egg and soft tissue are discharged. (c) It lasts 3-5 days. (ii) Follicular Phase/Proliferative Phase (a) The primary follicles in the ovary grow and become a fully mature Graafian follicle. (b) The endometrium of the uterus is regenerated due to the secretion of LH and FSH from anterior pituitary and ovarian hormone, estrogen. (c) It least for about 10-14 days. (iii) Ovulatory Phase (a) Rapid secretion of LH (LH surge) induces rupture of Graafian follicle, thereby leading to ovulation (release of ovum). (b) It lasts for only about 48 hr. (iv) Luteal Phase/Secretor Phase (a) In this phase the ruptured follicle changes into corpus luteum in the ovary and it begins to secrete the hormone progesterone. (b) The endometrium thickens further and their glands secrete a fluid into the uterus. c) If ovum is not fertilized, the corpus luteum undergoes degeneration and this causes disintegration of the endometrium leading to menstruation

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Reproduction system and Embryology quiz-15
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