Embryo Exam

1.

1 point

25. Intermediate mesoderm is source for:

c. primitive gut

a. kidney

b. ectoderm

2.

1 point

49. acrosomal reaction is

d. … & zona pellucida

b. non-specific

a. specific

c. hyaluronidas digestive cells of corona radiata

3.

1 point

27. blastopathies develop if teratogens affect:

f. time period from the 9th week until the birth

c. growth and differentiation of organs -

a. parental germ cells

b. differentiation of organs

g. time period from 16th day until the end of 8th embryonic week

e. embryo & its membranes

d. first 15 days

4.

1 point

3. spinal cord of foetus

a. reaches the S1 in the 6th month

b. reaches the L1 around the 9th month

c. reaches the L3 around the 9th month

5.

1 point

17. primitive streak …

b. from the endoderm

f. from the epiblast

d. from the cranial pole of germ disk

a. from the ectoderm

c. from the caudal pole of germ disk

e. from the hypoblast

6.

1 point

33. mark the WRONG suggestions about the yolk sac:

c. ho-rn/m-ing of hemopoietic islands

d. development of allantois blood vessels

a. ho-rn/m-ing of gonocytes

b. ho-rn/m-ing of connective tissue remnant

e. ho-rn/m-ing of T and B lymphocyte precursors

7.

1 point

32. auricular structures are:

c. ear of small size

b. ectodermal hyperplasia

a. patchy closed meatus acousticus externus

8.

1 point

26. put in right order the following events in retinal development:
a. development of n. opticus
b. appearance of the internal & external neuroblast layer
c. appearance of pigment retina, neural retina & intraretinal space
d. closure of intraretinal space

c, b, a, d

b, a, d, c

a, b, c, d

d, c, b, a

9.

1 point

20. please, put in right order the following events:
a. fusion of nasomedial and nasolateral folds
b. fusion of maxillary fold and nasomedial fold
c. fusion of maxillary and nasolateral folds
d. fusion of mandibular folds

d, a, b, c

a, b, c, d

d, c, b, a

d, a, c, b

10.

1 point

31. place in right order the following events:
a. proliferation of epithelium into the meatus acousticus externus
b. development of tragus, helix & concha
c. recanalization of the meatus acousticus externus
d. development of auricle
e. final forming of meatus acousticus externus

d, b, a, c, e

b, d, a, c, e

a, b, c, e, d

c, b, a, e, d

11.

1 point

23. meckel’s diverticle develops from:

b. remnant of yolk sac

a. remnant of allantois

c. remnant of ductus vitellinus

12.

1 point

38. secondary palate develops:

b. from intermaxillary segment giving the primary palate

a. as palatal processes at the maxillary fold

c. from lateral nasal fold

13.

1 point

15. the first lymphocytes that develop during embryogenesis are

a. precursor of T ly

c. precursor of B ly (or a)

b. precursor of T ly & B ly

14.

1 point

45. heart conducting system develops from

a. splanchnopleuric mesoderm

b. neural crest

c. pleiropericardial fold

15.

1 point

9. male infertility is suggested to show following number of spermatozoa in 1 ml of sperm:

d. 100 000 millions

a. 100 millions

c. 70 millions

b. 30 millions

16.

1 point

19. the induced stem cells are:

b. those undifferentiated cells which transfer into the differentiated cells

a. those differentiated cells which transfer into the undifferentiated ones

c. all … cells

d. all … cells

17.

1 point

36. during embryonic life foetus receives the oxygenated blood via:

a. right umbilical vein

c. right umbilical artery

b. left umbilical vein

d. left umbilical artery

18.

1 point

7. spermiogenesis is the same as:

c. gametogenesis

b. spermiohistogenesis

a. spermatogenesis

19.

1 point

46. critical periods in heart development are:

d. sept of ventricles

g. development of arotic pulmonal sept

b. development of valves

e. development of ventricular foramen

h. fusion of endocardial cushions

c. sept of atrium

f. development of awesome region

a. fusion of endocardial tubes

20.

1 point

30. the Ist pharyngeal pouch gives:

b. tympanic cavity and Eustachian tube

c. auricula

a. tympanic membrane

21.

1 point

parotid gland develops from:

c. from the mesoderm

b. from the endoderm

a. from the ectoderm

22.

1 point

sternum develops:

a. from somatopleura

c. from interclavicular blastema

d. until 17-18 years

e. until 25 years

b. from splanchnopleura

23.

1 point

43. myoepicardium develops from:

b. somatopleura

c. from heart jelly

a. splanchnopleura

24.

1 point

42. the first main blood vessels during embryogenesis are:

b. vv. precardinales

a. aortae dorsales

c. vv. postcardinales

d. branchial arch arteries

25.

1 point

5. place in correct following order these events:

a. desmal ossification and differentiation of myoblasts into the muscle
b. downgrowth of the lateral palatal primordial
c. elevation of palatal primordial
d. fusion of all primordial
e. disappearance of the epithelial seam

a, b, c, d, e

b, c, d, e, a

e, d, c, b, a

c, d, e, a, b

26.

1 point

10. dermis and subcutis developing structures are:

b. in dorsal part of trunk from the dermatome of somites, in lateral part of trunk – from the lateral mesoderm

a. in dorsal part of trunk from the … of somites, in lateral trunk part – from the intermediate mesoderm

c. in dorsal part of trunk from the lateral mesoderm, in lateral part of trunk – from the dermatomes

27.

1 point

4. epithelial seam of palate disappears due to the:

c. transforming of epitheliocytes into the mesenchymal cells

b. outmigration of epithelial cells

a. fusion of palate primordia

d. influence of TGFbeta

28.

1 point

47. link numebrs to ABC
I a) a. carotis communis & a. carotis interna proximal part
II b) a. hyaloidea & a. stapedia
III c) a. maxillaris & a. carotis externa
IV d) a. pulmonaris sin et dx & ductus arteriosus
VI e) a. subclavia & truncus braciocephalicus on the right aortic arch on the left

1c, 2b, 3a, 4e, 5d

1b, 2c, 3a, 4e, 5d

1e, 2d, 3c, 4b, 5a

1b, 2a, 3c, 4d, 5e

29.

1 point

22. neuropore rostralis

a. closes at day 24

c. closes at day 22

b. closes at day 26

30.

1 point

11. the first skin derivates … are:

a. sweat and sebaceous glands

c. sebaceous glands and hair follicles

b. sweat glands and hair follicles

31.

1 point

16. gastrulation

b. at the day 21

c. in dev. of bilaminar embryo

a. starts at day 15

d. in dev. of ectoderm, endoderm & mesoderm

32.

1 point

41. megoblastic periods involve:

d. development of hemopoietic islands

a. development of hematocytoblast & angioblasts

b. development of proerythroblasts

e. development of skin hemopoietic islands

c. development of progranuloblasts

33.

1 point

name somites that transform back into the spread from after the differentiation:

a. sacral

e. Ch?

f. Th1

c. lumbar

c. all thoracal

b. all cervical

34.

1 point

12. tongue papilla development is induced(?) by

a. n. facialis

d. n. glossopharyngeus

e. n.

c. n.

b. n.

35.

1 point

39. muscle of internal organs develops from:

a. splanchnopleuric mesoderm

c. ectodem

b. somatopleuric mesoderm

d. myoepithelium

36.

1 point

6. gonocytes are:

e. demonstrate ameboid-like movement

a. round, already differentiated cells

c. rich by alkaline phosphatase and glycogen

f. demonstrate undulation

d. scarce with alkaline phosphatase and glycogen

b. oval, undifferentiated cells

38.

1 point

21. hyp… gives:

g. rectal column

d. cervical muscles

c. trunk extensors

i. straight abdominal muscle

h. pectoral muscle

b. cervical, thoracic and abdominal skeletal striated muscles

f. oblique abdominal muscles and transversal abdominal muscle

a. flexors

e. external and internal intercostal and subcostal muscles

39.

1 point

35. place in the correct order the phases of intrauterine life:
1. gametogenesis,
2. blastogenesis
3. embryogenesis
4. fetogenesis,

3 1 4 2

3 1 2 5

1 3 2 4

1 3 4 2

40.

1 point

34. chorion:

b. is source for the connective tissue

c. develops the anchor villi

e. villi cover all its surface until the 13th embryonic week

a. develops from the extraembryonic mesoderm

f. villi disappears from the smooth chorion after the embryonic week 13

d. villi cover all its surface until the 8th embryonic week

41.

1 point

8. the strongest inducers of intrauterine growth are:

a. IGF

b. ICF.RI

c. insulin

d. HGF

e. TGFbeta

f. BMP 2/4

g. Ephrins

42.

1 point

48. vv. vitelline:

c. the right obliterates, the left gives v. porta

a. ingrowth into the liver primordia

b. the left obliterates, right gives v. porta

43.

1 point

28. the first eyeball muscles during development are:

a. lateral oblique

d. lateral

c. common primordia of inferior rectal and oblique

b. medial rectal

e. superior rectal

44.

1 point

aplasia is:

placement of organ in atypical site

absence of organ opening

undeveloped organ with still persistent primordial of its blood vessel primordia

45.

1 point

14. The first developing zones from the embryonic adrenal gland are

c. zona

b. zona

a. zona glomerulosa & zona fasciculata

46.

1 point

37. membrana pupillaris is:

c. remnant of conjunctive sac

b. remnant of posterior wall of anterior eye chamber

a. remnant of anterior wall of anterior eye chamber

47.

1 point

13. parathyroid gland develops from:

a. I & II pharyngeal pouches

b. III & IV pharyngeal pouches

c. V & IV pharyngeal pouches

48.

1 point

29. ear placode gives:

b. corti organs

c. membranous labyrinth

a. bone labyrinth

49.

1 point

2. blasthopathia develops in case if teratogens influence appears

a. from the 9th week until the birth

c. within first 15 days

b. from the day 16 until the end of 8th week

50.

1 point

44. cotyledonis is:

d. placental lobes

c. all tertiary villi branching

a. branching tree of one tertiary villi

b. mature placenta