Embryology 65 Questions PDF

Embryology 1 Ensure a thorough review of questions before making attempts. Name: Tomorrow's Scholar 14 Dec 2023 - 10:44PM Score Correct 96.9% 63 63 Wrong 3.1%...

Embryology 1 Ensure a thorough review of questions before making attempts. Name: Tomorrow's Scholar 14 Dec 2023 - 10:44PM Score Correct 96.9% 63 63 Wrong 3.1% 2 97% 65 Skipped 0% 0 Note: This score is not nal 1. The arrangements of the processes of spermiogenesis from nal to initial. (1) formation of the acrosome (2) condensation of the nucleus (3) formation of neck, middle piece, and tail (4) shedding of most of the cytoplasm 4-3-2-1 1/1Marks 2. Spermatozoa may be giants or dwarfs True 1/1Marks 3. Spermatozoa obtain full motility in the seminiferous tubules. False 1/1Marks 4. Spermatogenesis, which begins at puberty, includes all of the events by which spermatogonia are transformed into spermatozoa.  True 1/1Marks 5. Maturation of Sperm Begins at Puberty 1/1Marks 6. Supporting cells, which are derived from the surface epithelium of the testis in the same manner as? follicular cells 1/1Marks 7. The production of which cells mark the initiation of spermatogenesis. Type A spermatogonia 1/1Marks 8. The stem cells that proliferate and replenish the root source of all spermatozoa are the? Type A spermatogonia 1/1Marks 9. The stage in Spermatocytogenesis when cells are haploid occurs at? Secondary spermatocytes 1/1Marks 10. Homologous recombination of chromosomes occurs in this stage. Primary spermatocytes 1/1Marks 11. Spermatogenesis is divided into three processes False 1/1Marks 12 Type B spermatogonia continue to divide by mitosis until they 12. Type B spermatogonia continue to divide by mitosis until they become primary spermatocytes. True 1/1Marks 13. The pause in prophase of meiosis I of oogenesis may continue for 45 years or more. True 1/1Marks 14. The number of primordial follicles vastly increases during the foetal period but many degenerate, leaving around 400,000 follicles available at puberty. True 1/1Marks 15. When the follicle forms more than one layer of granulosa cells it is called a secondary follicle True 1/1Marks 16. After birth no new oocytes form. True 1/1Marks 17. The granulosa cells form the zona pellucida True 1/1Marks 18. Once PGCs have arrived in the gonad of a genetic female, they differentiate into oogonia and these cells undergo a meiotic division. False 1/1Marks 19. The connective tissue cells of the ovary around the follicle respond to the antrum by differentiating and forming two new layers: the theca interna and the theca externa. The theca interna has a supportive role, and the theca externa a hormonal role. False 1/1Marks 20. The stage of spermiogenesis which involves the secondary spermatocytes enter meiosis II to divide and forms spermatids. False 1/1Marks 21. The cells that are about to begin meiosis are called spermatogonia B cells, and can be recognised partly because they are connected to one another by cytoplasmic bridges. True 1/1Marks 22. As primordial follicles begin to grow, surrounding follicular cells change from at to cuboidal and proliferate to produce a strati ed epithelium of granulosa cells, and the unit is called a primary follicle True 1/1Marks 23. A secondary oocyte surrounded by a thin layer of squamous epithelial cells is called a primordial follicle. False 1/1Marks 24. Spermatogenesis takes around ___ days to produce spermatozoa from germ cells. 64 1/1Marks 25. Primary spermatocytes enter a prolonged prophase of _____ days followed by rapid completion of meiosis I and formation of secondary spermatocytes. 22 1/1Marks 26. Which of the following is not a biological or environmental factor that will affect gametogenesis, sperm count and fertility None of the above 1/1Marks 27. In relation to the mature spermatozoon the acrosomic cap is the most likely source of hyaluronidase which is essential for fertilization 1/1Marks 28. Which part of the sperm cell undergoes elongation and becomes the tail during spermiogenesis? Centriole 1/1Marks 29. What is the ultimate goal of spermatogenesis in terms of the number of sperm produced per spermatogonium? 4 sperm per spermatogonium 1/1Marks 30. During spermiogenesis, the acrosome forms from which cellular structure? Golgi apparatus 1/1Marks 31. What is the role of the acrosome in a sperm cell? Fertilization 1/1Marks 32. Maturation of oocyte Begins at Puberty 0/1Marks Before Birth 33 Every month 15 to 20 follicles begin to grow and as they 33. Every month,15 to 20 follicles begin to grow, and as they mature, they pass through three stages Which stage lasts the longest? antral 1/1Marks 34. How many times is oogenesis halted? twice 1/1Marks 35. The cells surrounding the oocyte in a mature Graa an follicle are called cumulus oophorus 1/1Marks 36. The attachment point of the cumulus ooph'orus to the most peripheral granulosa cells of an antral follicle is called? discus proligerus 1/1Marks 37. Which of the following statement is not true about oogenesis? The second meiotic division is completed before fertilization 1/1Marks 38. From the time of birth up to puberty the number of oogonia decreases 1/1Marks 39. The non-cellular membrane of human ovum is called ________. zona pellucida 1/1Marks 40. The division in primary oocytes arrests at _______ stage. prophase of meiosis I 1/1Marks 41. The division in secondary oocytes arrests at stage. 41. The division in secondary oocytes arrests at _______ stage. metaphase of meiosis II 1/1Marks 42. Meiosis II in secondary oocytes is not completed until ________. Fertilization 1/1Marks 43. In relation to the developing Graa an follicle a number of follicles start developing in one ovarian cycle 1/1Marks 44. Ovulation always occurs in the middle of the menstrual cycle 0/1Marks occurs 14 days before the onset of the next menstrual cycle 45. The average life of the ovum after ovulation is about 24 hours 1/1Marks 46. Rapid secretion of _____ induces ovulation. LH 1/1Marks 47. Which of the following hormones stimulates the development of ovarian follicles? FSH 1/1Marks 48. One primary oocyte produces _______ female gamete(s). 1 1/1Marks 49. Which of the following is vital to sperm motility Fructose 1/1Marks 50. The Environment of the vagina is inhospitable to the survival of sperm. True 1/1Marks 51. The openings of the uterine tubes into the uterus (uterotubal junction) represent another barrier to sperm transport. True 1/1Marks 52. The second barrier stopping sperm is the the cervix True 1/1Marks 53. Sperm transport into and through the uterus is assumed to be assisted by contractions of its thick smooth muscle walls. True 1/1Marks 54. The unsuccessful sperm are removed by leukocytes True 1/1Marks 55. Once in the tube, cumulus cells withdraw their cytoplasmic processes from the zona pellucida and lose contact with the oocyte. True 1/1Marks 56. Which of the following directly causes the release of the ovum and the cumulus oophorus from the ovary? Prostaglandin 1/1Marks 57. ______ ovulation, mbriae of the uterine tube sweep over the surface of the ovary and the tube itself begins to contract surface of the ovary, and the tube itself begins to contract rhythmically. Shortly before 1/1Marks 58. What is the primary process that propels the oocyte through the fallopian tube? Ciliary movement 1/1Marks 59. Where does the oocyte usually undergo fertilization by sperm? Ampulla of the fallopian tube 1/1Marks 60. What structures aid in capturing the released oocyte from the ovary into the fallopian tube? Fimbriae 1/1Marks 61. On ejaculation, the spermatozoa rapidly pass through the ductus deferens and become mixed with uid secretions from the seminal vesicles only False 1/1Marks 62. Prostatic uid is rich in Fructose, citric acid, acid phosphatase, zinc, and magnesium ions False 1/1Marks 63. Capacitation is a reaction necessary for a spermatozoon to be able to fertilize an egg. It is divided into two phases. False 1/1Marks 64. What is the usual duration for an oocyte to travel from the ovary to the ampulla of the fallopian tube?  Few hours 1/1Marks 65. The fallopian tube is divided into four parts, the longest part is the? Ampulla 1/1Marks Powered by 'SurveyHeart'