Embryo Test 4 4

Front 1

1. The muscularis externa of the small intestine is derived from ____ mesoderm.
A. paraxial
B. somatic
C. intermediate
D. splanchnic

Back 1

D. splanchnic

Front 2

2. Which of the following supplies derivatives of the foregut?
A. superior mesenteric artery
B. inferior mesenteric artery
C. celiac trunk
D. gastric trunk

Back 2

C. celiac trunk

Front 3

3. Which of the following develops into the jejunum?
A. foregut
B. midgut
C. hindgut
D. foregut and midgut

Back 3

B. midgut

Front 4

4. Which of the following persists as the uncinate process of the pancreas?
A. dorsal bud
B. ventral bud
C. both

Back 4

B. ventral bud

Front 5

5. Remnants of the dorsal mesogastrium can be seen in the adult falciform ligament.
A. true B. false

Back 5

B. false

Front 6

6. During fetal development, hematopoiesis mostly occurs in the:
A. pancreas
B. spleen
C. liver
D. bone marrow

Back 6

C. liver

Front 7

7. The cloaca is a region of the:
A. foregut
B. midgut
C. hindgut

Back 7

C. hindgut

Front 8

8. The transverse colon develops from the:
A. foregut
B. midgut
C. hindgut
D. midgut and hindgut

Back 8

D. midgut and hindgut

Front 9

9. Meckel’s diverticulum represents a persistent portion of the allantois.
A. true B. false

Back 9

B. false

Front 10

10. The condition in which the gut fails to retract into the abdomen is referred to as:
A. atresia
B. stenosis
C. omphalocele
D. gastroschisis

Back 10

C. omphalocele

Front 11

11. The temporary kidney that develops from the thoracic region to the sacral region of the embryo is known as the _____ kidney.
A. pronephric
B. mesonephric
C. metanephric

Back 11

B. mesonephric

Front 12

12. The metanephric tissue cap develops into the ____ of the adult kidney.
A. nephrons
B. collecting ducts
C. both
D. neither

Back 12

A. nephrons

Front 13

13. The urethra of females is derived from the ____ region of the urogenital sinus.
A. upper
B. middle
C. lower
D. none of the above

Back 13

B. middle

Front 14

14. A urachal fistula represents a persistent portion of the vitelline duct.
A. true B. false

Back 14

B. false

Front 15

15. Hypospadias occurs when:
A. the wall of the bladder is incompletely formed
B. the urethral folds fail to fuse
C. the genital tubercle forms inferior to the urethral folds
D. the urorectal septum fails to form

Back 15

B. the urethral folds fail to fuse

Front 16

16. Forms the middle ear cavity AD

17. Contributes to the palatine tonsil AE

18. Forms the stapes C

19. Forms the constrictor muscles of the pharynx AB

20. Forms the thymus BD

21. Forms the superior parathyroid gland BE

22. Forms the muscles of facial expression. C

23. Forms the lesser horn of the hyoid C

Back 16

16. Forms the middle ear cavity
17. Contributes to the palatine tonsil
18. Forms the stapes
19. Forms the constrictor muscles of the pharynx
20. Forms the thymus
21. Forms the superior parathyroid gland
22. Forms the muscles of facial expression
23. Forms the lesser horn of the hyoid

Front 17

24. The follicular cells of the female ovary are derived from:
A. the wall of the yolk sac
B. intermediate mesoderm
C. both
D. neither

Back 17

B. intermediate mesoderm

Front 18

25. Initially, the testes develops from the indifferent gonad in response to:
A. testosterone
B. MIS
C. dihydrotestosterone
D. TDF

Back 18

D. TDF

Front 19

26. The mesonephric duct develops into the:
A. vas deferens
B. uterine tubes
C. both
D. neither

Back 19

A. vas deferens

Front 20

27. The scrotal sac develops from the:
A. urethral folds
B. genital swellings
C. genital tubercle
D. none of the above

Back 20

B. genital swellings

Front 21

28. AIS occurs in individuals who are genotypically 46,XY.
A. true
B. false

Back 21

A. true

Front 22

29. The masseter muscle develops from cells of arch:
A. I
B. II
C. III
D. IV

Back 22

A. I

Front 23

30. Which of the following innervates derivatives of arch IV?
A. CN VII
B. CN VIII
C. CN X
D. CN XII

Back 23

C. CN X

Front 24

31. The zygomaticus major muscle develops from cells of arch:
A. I
B. II
C. III
D. IV

Back 24

B. II

Front 25

32. Cells of pouch ___ become incorporated in the thyroid gland.
A. 3
B. 4
C. 5
D. none of the above

Back 25

C. 5

Front 26

33. The oral part of the tongue is separated from the root of the tongue by the lingual septum.
A. true B. false

Back 26

B. false

Front 27

34. Each of the following cranial nerves contributes to the innervation of the tongue except:
A. IX
B. X
C. XI
D. XII

Back 27

C. XI

Front 28

35. Taste information from the oral part of the tongue is transmitted through cranial nerve:
A. V
B. VII
C. IX
D. X

Back 28

B. VII

Front 29

36. The thyroglossal duct persists in the adult as the cervical sinus.
A. true B. false

Back 29

B. false

Front 30

37. Thyroid follicles are derived from pouch:
A. 3
B. 4
C. 5
D. none of the above

Back 30

D. none of the above

Front 31

38. Structures of the adult nose are derived from the:
A. medial nasal prominence
B. lateral nasal prominence
C. both
D. neither

Back 31

C. both

Front 32

39. Nasal placodes develop on the surface of the:
A. frontonasal prominence
B. maxillary prominence
C. mandibular prominence
D. none of the above

Back 32

A. frontonasal prominence

Front 33

40. The lips are derived from all of the following except the:
A. medial nasal prominence
B. lateral nasal prominence
C. maxillary prominence
D. mandibular prominence

Back 33

B. lateral nasal prominence

Front 34

41. The nasolacrimal groove lies between the:
A. medial nasal prominence and lateral nasal prominence
B. medial nasal prominence and maxillary prominence
C. lateral nasal prominence and maxillary prominence
D. maxillary prominence and mandibular prominence

Back 34

C. lateral nasal prominence and maxillary prominence

Front 35

42. The intermaxillary segment develops from the fusion of the medial nasal prominence with the lateral nasal prominence.
A. true B. false

Back 35

B. false

Front 36

43. The primary palate develops from the:
A. medial nasal prominence
B. lateral nasal prominence
C. maxillary prominence
D. mandibular prominence

Back 36

A. medial nasal prominence

Front 37

44. The incisive foramen is found at the junction of the:
A. oral part of the tongue and the root of the tongue
B. primary palate and secondary palate

Back 37

B. primary palate and secondary palate

Front 38

45. The nasal cavities and oral cavity are completely separated throughout fetal development.
A. true B. false

Back 38

B. false

Front 39

A. thyroglossal cyst
B. branchial cyst
C. cervical cyst

Back 39

46. remnants of cleft 2, 3, and 4
B. branchial cyst

47. found in the midline
C. cervical cyst

Front 40

48. Each of the following is associated with abnormal development of arch I except:
A. Treacher Collins syndrome
B. DiGeorge syndrome
C. Pierre Robin syndrome
D. all are associated with abnormal development of arch I

Back 40

B. DiGeorge syndrome

Front 41

49. Anterior cleft lip results from failure of the medial nasal prominence to fuse with the lateral nasal prominence.
A. true B. false

Back 41

B. false

Front 42

50. Failure of the palatine shelves to fuse results in a(n) ______ cleft.
A. anterior
B. posterior

Back 42

B. posterior