Medical Student Cheater: Practice Tests: Cytology

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Thursday, July 28, 2011

Practice Tests: Cytology

1. Period of human development after fertilization from the 2nd to 8th week inclusive
  • a. period of zygote 
  • b. period of embryo 
  • c. period of fetus 
  • d. none of the above 
2. When does the haploid # of chromosomes restored to 46 chromosomes
  • a. blastomere 
  • b. morula 
  • c. zygote 
3. The fixation of fate in the embryo and the assignment of irrevocable structures of diff. forms for the future is
  • a. differentiation 
  • b. regulation 
  • c. determination 
  • d. destiny 
4. Primary organizer for cell differentiation
  • a. chora-mesoderm 
  • b. primitive 
  • c. primitive streak 
5. The amnion derives its origin from the
  • a. outer cell layer 
  • b. cytotrophoblast 
  • c. synsytiotrophoblast 
  • d. inner cell mass 
6. The space between the split of lateral mesoderm of a 4 wk embryo
  • Answe: Coelom 
7. Urinary bladder derived from
  • a. axial mesoderm 
  • b. paraxial meso 
  • c. intermediate meso 
  • d. lateral meso 
8. Interatrial opening of the fetal heart through w/c caval blood is shunted to the left atria is the
  • a. foramen ovale 
  • b. fossa ovalis 
  • c. ductus venosus 
  • d. sinus arteriosus 
9. The condition resulting from arrested testicular descent at any point along the normal path is
  • a. inguinal hernia 
  • b. hydrocele 
  • c. undecided / undescending testis 
  • d. cryptochidism 
10. The distal hindgut is derived into 2, by the condensation of mesoderm result to the formation or
  • Answer: Urorectal septum 
11. Which of the ff structures is a primitive midgut derivative
  • a. appendix 
  • b. stomach 
  • c. liver 
  • d. pancreas 
12. Neural crest cell derivative
  • a. epidermis & hair 
  • b. otic placoid 
  • c. nasal & lacrymal bone 
  • d. maxilla 
13. Rhombocephalon is the primitive stage of the
  • a. forebrain, frontal 
  • b. cortical 
  • c. medulla, midbrain 
  • d. hindbrain & cerebello-pontine area (sakto spelling?) 
14. Fetal age is more accurately determined by
  • a. biparietal diameter 
  • b. cheek to cheek 
  • c. CRL 
15. Somites will differentiate into all except
  • a. bone 
  • b. cartilage 
  • c. muscle 
  • d. skin/epidermis 
16. Surfactant is secreted by
  • a. type I pneumocytes 
  • b. type II pneumocytes 
  • c. macrophage 
17. What is the epithelial lining trachea? Where is it derived?
  • a. mesoderm 
  • b. endoderm 
  • c. ectoderm 
  • d. neuroectoderm 
18. First sign of respiratory development
  • a. hypobranchial eminence 
  • b. primitive foregut 
  • c. urorectal septum 
  • d. laryngotracheal diverticulum/ lung bud 
19. Smooth muscle, connective tissue, & cartilage of the primary bronchi are derived from which of the following sources
  • a. neuroectoderm 
  • b. ectoderm 
  • c. endoderm 
  • d. visceral mesoderm 
20. The prechordal plate marks the site for the future
  • a. umbilical cord 
  • b. heart 
  • c. month 
  • d. anus 
21. Artery that supplies derivatives of the forgut
  • a. celiac arterial trunk 
  • b. superior mesenteric artery 
  • c. inferior mesenteric artery 
  • d. right umbilical artery 
22. Reason for the doudenal loop being located on the right side of the midline to the vertebrae is:
  • a. the liver is on the right side 
  • b. balance pancreas, towards the left 
  • c. 280º 
  • d. pull of gravity 
23. Intermediate mesoderm...
  • a. neural tube 
  • b. heart 
  • c. kidney & gonads 
  • d. somites 
24. What is the normal amt of amniotic fluid at term?
  • a. 50ml 
  • b. 500ml 
  • c. 1000ml 
  • d. 2000ml 
25. What layer/s characterizes the urinary system?
  • a. endoderm 
  • b. mesoderm 
  • c. endoderm & mesoderm 
  • d. ectoderm 
26. Which is a characteristic describing the female reproductive system?
  • a. clitoris – male phallus 
  • b. urethral folds do not fuse 
  • c. urethral folds – labia minora 
  • d. all of the above 
27. Genetic sex is determined at what stage
  • a. 7th wk 
  • b. diff. Of male gonads 
  • c. mesonephric degeneration 
  • d. at fertilization 
28. Fate of the blastomere at 4-cell stage
  • a. totipotent 
  • b. pluripotent 
  • c. omnipotent 
  • d. none of the above 
29. Early embryonic cell communication systems involved in development are mediated by a general process of
  • a. binding @ tyrosine-kinase liked receptors @ the cell membrane 
  • b. DNA transcription 
  • c. neuro-endocrine response 
  • d. voltage-activated mediator release in the nuclear membranes 
30. A person with the same allele found in the same location of a chromosome is called
  • a. homozygote 
  • b. heterozygote 
  • c. hemizygote 
31. Trachea cartilage rises from:
  • a. ectoderm 
  • b. mesoderm 
  • c. endoderm 
32. Pancreatic duct epithelium  rises from:
  • a. ectoderm 
  • b. mesoderm 
  • c. endoderm 
33. Uterus epithelium rises from:
  • a. ectoderm 
  • b. mesoderm 
  • c. endoderm 
34. Epithelium of the urinary bladder rises from:
  • a. ectoderm 
  • b. mesoderm 
  • c. endoderm 
35. Due to cytokinesis, spermatids are joined by
  • a. cytoplasmic bridges 
  • b. hematochromatin 
  • c. mitotic spindles 
  • d. tubulin dimers 
36. The average # of oocyte in females during puberty
  • a. 200,000 
  • b. 300,000 
  • c. 600,000 
  • d. 1,000,000 
37. The stage of the male germ cell at birth
  • a. primary spermatocyte 
  • b. secondary spermatocyte 
  • c. spermatid 
  • d. none of the above 
38. Which process is undergone in the development of a sperm
  • Answer: Acrosomal formation 
39. GnRH is secreted by
  • Answer: Hypothalamus 
40. The layer of the endothelium that remains to regenerate after menstruation
  • a. compact 
  • b. spongy 
  • c. functional 
  • d. basal 
41. What is the first structure that the sperm cell encounters during fertilization
  • a. corona radiata 
  • b. theca 
  • c. zona pellucida 
  • d. granulosa cells 
42. The primary underlying factor for the endometrial shedding w/c leads to menstruation in
  • a. FSH surge 
  • b. progesterone 
  • c. LH decline 
  • d. estrogen withdrawal 
43. Which of the ff is a feature of the umbilical cord
  • a. surrounded by chorion 
  • b. contains Wharton's jelly 
  • c. contains 2 umbilical veins 
  • d. attached to the maternal side of the placenta 
44. The superficial layer of the endometrium overlying the embryo
  • a. decidua capsularis 
  • b. decidua ______ 
  • c. decidua basalis 
  • d. decidua parietalis 
45. Process of exchange between placental and maternal blood?
  • a. active transport 
  • b. facilitated transport 
  • c. pinocytosis 
  • d. all of the above 
46. Antibody that is passed to the fetus throgh the placenta
  • a. IgG 
  • b. IgA 
  • c. IgM 
  • d. IgE 
47. Componentsof placental membrane
  • a. cytotrophoblast 
  • b. decidua basalis 
  • c. endothelial lining of endometrial membrane 
  • d. all of the above 
48. The syncytiotrophoblast
  • a. actively invades maternal tissues 
  • b. closes area of the blastocyst implantation 
  • d. produces progesterone 
49. Fertilization of 2 ova but not at the same coitus at a shorter time result to:
  • Answer: superfecundation 
50. Hormone hCG is produced by:
  • a. trophoblast 
  • b. allantois 
  • c. corpus luteum 
  • d. epiblast 
51. Fetal drinking and urination affect the volume of the fluid in the
  • Answer: Anmiotic sac 
52. At 38 weeks age of gestation, polyhydramnios occurs when the amniotic fluid volume:
  • a. 350 cc 
  • b. 700cc 
  • c. 1000 cc 
  • d. 2000 cc 
53. In twinning, what happens when the blatocystdivides in the 6th day?
  • a. monoamniotic, monochorionic 
  • b. monoamniotic, dichorionic 
  • c. diamniotic, monochorionic 
  • d. diamniotic, dicorionic 
54. Which is derived from the yolk sac?
  • a. umbilical artery 
  • b. urachus 
  • c. gonad 
  • d. none of the above 
55. Post ovulatory endometrium

  • Answer: secretory phase 
56. Type A spermatogonia
  • a. provide continuous reserve of stem cells 
  • b. enter prolonged prophase 
  • c. gives rise to primary spermatocytes 
  • d. undergo spermtogenesis 
57. Phase one of fertilization involves the penetration of the sperm to the:
  • Zona pellucida 
58. Cardiac activity can be detected during the:
  • a. 6th week 
  • b. 7th week 
  • c. 8th week 
  • d. 9th week 
59. During embryonic development which form is first detected by ultrasound?
  • a. dominant follicle 
  • b. zygote 
  • c. morula 
  • d. blastocyst 
60. Most accurate sonographic method of determining gestational age
  • a. mean sac diameter 
  • b. cardiac activity 
  • c. crown-rump length 
  • d. amniotic diameter 

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