Embryo Test 4 3

Front 1

1. The falciform ligament develops from the dorsal mesogastrium.
A. true B. false

Back 1

B. false

Front 2

2. The entrance of the main pancreatic duct in the adult is derived from the embryonic ____ pancreatic bud.
A. dorsal
B. ventral

Back 2

B. ventral

Front 3

3. In the adult, the accessory pancreatic duct is a remnant of the embryonic ____ pancreatic bud.
A. dorsal
B. ventral

Back 3

A. dorsal

Front 4

4. During early development, the mid gut rotates around the axis of the:
A. cloaca
B. ventral pancreatic bud
C. inferior mesenteric artery
D. superior mesenteric artery

Back 4

D. superior mesenteric artery

Front 5

5. The descending colon is derived from the:
A. midgut
B. hindgut
C. both
D. neither

Back 5

B. hindgut

Front 6

6. The cloaca develops into the adult rectum.
A. true B. false

Back 6

A. true

Front 7

7. Meckel’s diverticulum develops from a persistent portion of the:
A. urachus
B. dorsal pancreatic bud
C. perineum
D. vitelline duct

Back 7

D. vitelline duct

Front 8

8. Gastroschisis results from a:
A. defect in the ventral body wall
B. failure of the cloacal membrane to rupture
C. failure of development of autonomic ganglia
D. failure of the midgut to retract into the abdomen

Back 8

A. defect in the ventral body wall

Front 9

9. Filtration units develop in the ___ kidney.
A. mesonephric
B. metanephric
C. both
D. neither

Back 9

C. both

Front 10

10. Which of the following contributes to the male reproductive system?
A. mesonephros
B. metanephros
C. both
D. neither

Back 10

A. mesonephros

Front 11

11. Which of the following is derived from the ureteric bud?
A. loop of Henle
B. Bowman’s capsule
C. urethra
D. ureter

Back 11

D. ureter

Front 12

12. Which of the following develops in intermediate mesoderm?
A. pronephros
B. mesonephros
C. metanephros
D. all of the above

Back 12

D. all of the above

Front 13

13. All of the following develop from the urogenital sinus except:
A. female urethra
B. prostatic urethra
C. penile urethra
D. all develop from the urogenital sinus

Back 13

D. all develop from the urogenital sinus

Front 14

14. Hypospadias occurs when the genital tubercle develops inferior to the urethral folds.
A. true B. false

Back 14

B. false

Front 15

15. All of the following develop from intermediate mesoderm except:
A. medullary cords of the gonad
B. cortical cords of the gonad
C. primordial germ cells
D. all develop from intermediate mesoderm

Back 15

C. primordial germ cells

Front 16

16. The seminiferous tubules develop from the medullary cords of the gonad.
A. true B. false

Back 16

A. true

Front 17

17. MIS is produced in the developing ____ gonad.
A. male
B. female
C. both
D. neither

Back 17

A. male

Front 18

18. The _____ duct develops into the duct system of the male reproductive tract.
A. mesonephric
B. paramesonephric
C. both
D. neither

Back 18

A. mesonephric

Front 19

19. The labia majora and scrotum both develop from the genital swellings.
A. true B. false

Back 19

A. true

Front 20

20. Female pseudohermaphroditism is most commonly caused by:
A. failure of the paramesonephric ducts to fuse
B. mutant testosterone receptors
C. adrenal hyperplasia
D. low testosterone levels

Back 20

C. adrenal hyperplasia

Front 21

21. A urachal cyst is a remnant of the:
A. urogenital sinus
B. urogenital ridge
C. cloaca
D. allantois

Back 21

D. allantois

Front 22

22. The muscles of the larynx are derived from arch:
A. IV
B. VI
C. both
D. neither

Back 22

B. VI

Front 23

23. Which of the following muscles is derived from arch I?
A. zygomaticus major
B. masseter
C. stylohyoid
D. stylopharyngeus

Back 23

B. masseter

Front 24

24. Which of the following innervates derivatives of arch III?
A. CN V
B. CN VII
C. CN X
D. none of the above

Back 24

D. none of the above

Front 25

25. The hyoid bone develops from arch:
A. III
B. IV
C. both
D. neither

Back 25

A. III

Front 26

26. The digastric muscle is innervated by:
A. CN V
B. CN VII
C. both
D. neither

Back 26

C. both

Front 27

27. The incus of the middle ear is derived from arch:
A. I
B. II
C. both
D. neither

Back 27

A. I

Front 28

28. The middle ear cavity develops from:
A. arch I
B. pouch 1
C. cleft 1
D. all of the above

Back 28

B. pouch 1

Front 29

29. Which of the following is derived from pouch 2?
A. thymus
B. superior parathyroid
C. inferior parathyroid
D. palatine tonsil

Back 29

D. palatine tonsil

Front 30

30. All of the following develop from arch I except:
A. tongue
B. lower lip
C. upper lip
D. all develop from arch I

Back 30

D. all develop from arch I

Front 31

31. The ultimobranchial body develops into which of the following?
A. superior parathyroid
B. inferior parathyroid
C. thymus
D. parafollicular cells

Back 31

D. parafollicular cells

Front 32

32. The external acoustic meatus develops from:
A. cleft 1
B. pouch 1
C. cleft 2
D. pouch 2

Back 32

A. cleft 1

Front 33

33. The cervical sinus develops from cleft:
A. 2
B. 3
C. 4
D. all of the above

Back 33

D. all of the above

Front 34

34. The maxilla develops from:
A. arch I
B. intermaxillary segment
C. both
D. neither

Back 34

C. both

Front 35

35. The tongue develops from all of the following except:
A. arch I
B. arch II
C. arch III
D. it develops from all of the above

Back 35

B. arch II

Front 36

36. The tongue is innervated by all of the following cranial nerves except:
A. CN V
B. CN VII
C. CN IX
D. it is innervated by all of the above

Back 36

D. it is innervated by all of the above

Front 37

37. Follicular cells of the thyroid are derived from the thyroid diverticulum.
A. true B. false

Back 37

A. true

Front 38

38. The palatine shelves are derived from:
A. arch I
B. intermaxillary segment
C. both
D. neither

Back 38

A. arch I

Front 39

39. Which of the following develops into the primary palate?
A. medial nasal prominences
B. arch I
C. hypobranchial eminence
D. all of the above

Back 39

A. medial nasal prominences

Front 40

A. frontonasal prominence
B. lateral nasal prominence
C. mandibular prominence
D. medial nasal prominence
E. maxillary prominence

Back 40

40. alae of the nose
B. lateral nasal prominence

41. upper incisor teeth
D. medial nasal prominence

42. bridge of the nose
A. frontonasal prominence

43. tip of the nose
D. medial nasal prominence

44. lower lip
C. mandibular prominence

45. philtrum of the upper lip
D. medial nasal prominence

Front 41

46. The most common site for a thyroglossal cyst is:
A. superior mediastinum
B. dorsal aspect of the neck
C. anterior border of the sternocleidomastoid muscle
D. midline close to the hyoid bone

Back 41

D. midline close to the hyoid bone

Front 42

47. Treacher Collins syndrome is associated with which of the following?
A. arch I
B. arch II
C. pouch 3
D. pouch 4

Back 42

A. arch I

Front 43

48. Cleft lip is a defect normally associated with a(n) ______ cleft.
A. anterior
B. posterior

Back 43

A. anterior

Front 44

49. Which of the following provides motor innervation to the tongue?
A. CN V
B. CN VII
C. CN IX
D. CN XII

Back 44

D. CN XII

Front 45

50. Ankyloglossia is characterized by failure of the lateral nasal prominence to fuse with the maxillary prominence.
A. true B. false

Back 45

B. false