EMBROYOLOGY SBA

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Question 1 of 20

1. Question
1. The immediate layer of cells around the oocyte of the tertiary follicle is known as the
- A. Zona pellucida
- B. Zona granulosa
- C. Follicular antrum
- D. Theca interna
- E. Cumulus oophorus
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Question 2 of 20

2. Question
2. Which is the Layer surrounding the Graffian follicle?
- A. Mural granulosa cell
- B. Cumulus oophorus
- C. Basal lamina
- D. Theca externa
- E. Theca interna
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Question 3 of 20

3. Question
3. In the process of fertilisation, what is the correct sequence for sperm penetration into the oocyte?
- A. Zona pellucida, perivitelline space, plasma membrane, corona radiata
- B. Zona pellucida, perivitelline space, corona radiata, perivitelline space
- C. Zona pellucida, corona radiata, plasma membrane, perivitelline space
- D. Corona radiata, zona pellucida, plasma membrane, perivitelline space
- E. Corona radiata, zona pellucida, perivitelline space, plasma membrane
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Question 4 of 20

4. Question
4. Which part of the spermatozoa has high concentration of mitochondria
- A. Head
- B. Neck
- C. Midpiece
- D. Flagellum
- E. Acrosome
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Question 5 of 20

5. Question
5. Which type of cells are phagocytic for residual cytoplasm left over from the process of spermiogenesis?
- A. Testicular mesenchymal cells
- B. Testicular macrophages
- C. Fibroblast cells
- D. Intestitial cells of Leydig
- E. Sertoli cells
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Question 6 of 20

6. Question
6. Sequence of cell stage in spermatogenesis is
- A. Spermatocytes – Spermatids – Spermatogonia – Spermatozoa
- B. Spermatogonia – Spermatids – Spermatocytes – Spermatozoa
- C. Spermatocytes – Spermatogonia – Spermatids – Spermatozoa
- D. Spermatogonia – Spermatocytes – Spermatids – Spermatozoa
- E. Spermatocyte – Spermatogonia – Spermatozoa – Spermatids
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Question 7 of 20

7. Question
7. What is the actual genetic section of a sperm is its
- A. Acrosome
- B. Tail
- C. Middle piece
- D. Head
- E. Flagellum
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Question 8 of 20

8. Question
8. A primary spermatocyte will?
- A. Divides by mitosis to produce two secondary spermatocytes
- B. Divides by meiosis to produce two secondary spermatocytes
- C. Divides by meiosis to produce four spermatids
- D. Divides by meiosis to produce two spermatids
- E. Undergoes meiosis followed by mitosis and leads to formation of 4 spermatids
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Question 9 of 20

9. Question
9. Which of the following statements is correct about the zona pellucida:
- A. Surrounds the oocyte in the ovary
- B. Protects oocyte in the uterine tube
- C. Is a specialized extracellular matrix
- D. Is important for fertilization
- E. All of the above
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Question 10 of 20

10. Question
10. Which is the most correct sequence of early development following fertilization is:
- A. Zygote, blastomeres, morula, blastocyst
- B. Oocyte, zygote, morula, blastocyst
- C. Zygote, conceptus, blastocyst
- D. Polar bodies, zygote, conceptus, blastocyst
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Question 11 of 20

11. Question
11. Which of the following muscles are derived from the first brachial arch?
- A. The muscles of mastication
- B. The muscles of mastication and anterior belly of digastric
- C. The muscles of mastication and anterior and posterior bellies of digastric
- D. The muscles of mastication, anterior and posterior bellies of digastric and geniohyoid
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Question 12 of 20

12. Question
12. The specialized group of mesenchymal cells which aggregate to form blood islands are called:
- A. Hemoblasts
- B. Angioblasts
- C. Fibroblasts
- D. Yolk sac endoderm
- E. Wharton's jelly
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Question 13 of 20

13. Question
13. The most superior part of the inferior vena cava is derived from:
- A. Left vitelline vein
- B. Right vitelline vein
- C. Right umbilical vein
- D. Left umbilical vein
- E. Sinus venosus
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Question 14 of 20

14. Question
14. The embryonic origin of the ligamentum arteriosum is from the:
- A. Second arch artery
- B. Third arch artery
- C. Fourth arch artery
- D. Fifth arch artery
- E. Sixth arch artery
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Question 15 of 20

15. Question
15. Which of the following normally occurs during the neonatal period EXCEPT:
- A. Pressure decreases in the thoracic cavity
- B. Pressure increases in the left atrium
- C. Flattening of the alveolar epithelium of the lung
- D. Reversal of blood flow in the inferior vena cava
- E. Closure of the ductus venosus
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Question 16 of 20

16. Question
16. Which of the following associations are correct?
- A. Renal pelvis – ureteric bud
- B. Ureter – ureteric bud
- C. Urethra – urogenital sinus
- D. Median umbilical ligament – urachus
- E. All of the above are correct
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Question 17 of 20

17. Question
17. From where the calyces of the kidney arise?
- A. Endoderm
- B. Mesoderm
- C. Ectoderm
- D. Both
- E. Neither
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Question 18 of 20

18. Question
18. Choose the right option, The lower end of the mesonephric duct branches to form the:
- A. Ureteric bud
- B. Uterus bud
- C. Urethral bud
- D. Gonadal bud
- E. None of the above
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Question 19 of 20

19. Question
19. Describe the sequential development of the genital system?
- A. Internal and external genital tract dependent upon primordial germ cell hormone secretion
- B. Gonadal differentiation and hormone secretion determining internal then external tract development
- C. Mesonephric duct hormone secretion forming genital ridge then internal and external tract development
- D. Internal tract determining gonadal then hormone secretion for external tract development
- E. Paramesonephric duct forming genital ridge then hormone secretion for internal and external tract development
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Question 20 of 20

20. Question
20. Describe the relative movement of organs with the peritoneal cavity as?
- A. Descent of the adrenal glands and gonads
- B. Ascent of the adrenal glands and genital tubercle
- C. Ascent of the kidneys and descent of the gonads
- D. Descent of the kidneys and adrenal glands
- E. None of the above
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