Quiz on 2.1 & 2.4 Flashcards Preview

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Flashcards in Quiz on 2.1 & 2.4 Deck (73):
1

when gametes combine they form a

zygote

2

cell division that makes different types of cells from another cell is called

differentation

3

the hallow ball of cells form the zygote is the

blastula

4

a human 10 weeks of age from conception is

an embryo

5

the embryo will attach and gain nourishment through fingerlike projections into the uterus. this area will develop into the _______ and _______ of the fetus

chorion
amnion

6

the embryo differentiates into three primary ______ layers

germ

7

the future organs and systems built from the three germ lyers are its

derivitives

8

the _________ is the first derivative of the ectoderm on the outer body of the embryo

epidermis

9

ectoderm that has been folded in from the surface and sunk below the surface as a tube from head to tail is called the

neural tube

10

the combination of sperm and egg cells to form a zygote is called ___________ and it usually occurs in the fallopian tube

fertilization

11

_________ is the embedding of the developing embryo into the maternal uterine wall

implantation

12

T/F
the embryo is the group of cells that will differentiate into a human being

true

13

the blastula contains cells that differentiate into the embryo and the _______ and fluid

supporting tissue placenta

14

T/F
following development of the embryo, we begin with a flat plate of cells that fold up into a tube that then folds over as a C-shaped organism

true

15

at first, nourishment for the embryo comes from a temporary fluid-filled sac called the ______ sac

yolk

16

the three embryonic germ layers are

mesoderm
ectoderm
endoderm

17

ectoderm folding in along the length of the embryo is called the ________ groove and it becomes the ________ tube

neural
neural

18

neural tube derives the ________ and ________ of the central nervous system

brain
spinal cord

19

pairs of neural crest cells coming off the spinal cord will become the ________ nerves

spinal nerves

20

T/F
the only place in the embryo where ectoderm will turn into mesoderm is in the tail

false

21

the __________system consisting of the brain, spinal cord, and all the nerves derives from ectoderm

nervous

22

the _______ and _________ systems develop from the endodermial tube

respiratory
digestive

23

cells that bud off of the neural tube in pairs are called

neural crest cells

24

pairs of neural crest cells coming off the brain area will become

cranial nerves
facial mesoderm

25

the beginning portion of the developing endoderm tube is the ____ which is a wide area that forms paired pouches

pharynx

26

the endoderm tube bulges out and bends just beyond the esophagus to form the

stomach

27

paired bumps of mesoderm form along the sides of the neural tube and are called

somites

28

which is not a division of the somite

dermis

29

t/f
the circulatory system derives from paired tubes of endoderm

false

30

paired bumps growing along either side of the embroyo's head and neck region are called the pharyngeal

arches

31

the outside of an arch is covered with ____; the pouch is made of______

ectoderm
endoderm

32

t/f
grooves I and IV eventually disappear

false

33

which does not derive from pouch I?

external auditory meatus

34

what derives the palatine tonsils?

pouch II

35

the anterior two thirds of the tongue is called the

body

36

t/f
the lateral lingual processes coalesce with the tuberculum impar to form the posterior tongue

false

37

the v-shaped row of bumps on the tongue are the _____, and they mark be border between anterior and posterior tongue

circumvallate papillae

38

which pharyngeal arch divides into the maxillary and mandibular processes

I

39

which process does not come from the frontal process?

maxillary process

40

t/f
the globular process becomes the philtrum and the primary palate

true

41

two systems that give structure and movement to the body are the ______ and _______ systems, they derive from mesoderm

muscle
skeletal

42

the tissue that is "left over" from development with no particular funtion in the adult is called

remnant

43

the area of the embryo that will become the future mouth is called the _____. It is covered for a short time by the ______ membrane

stomodem
buccopharyngeal

44

the cartilage of arch I is called ______ cartilage

meckels

45

the ossicles come from the cartilage of arch I (Meckel's) and arch II, also known as _____ cartilage

reichets

46

how many processes come together to form the tongue

6

47

the remnant of the developing thyroid gland left on the surface of the tongue is called

foramen cecum

48

the facial process that becomes the forehead is called the ______ process

frontonasal

49

which processes coalesce to become the hard palate

primary palate

50

do the two maxillary processes ever come together?

yes

51

if facial processes do not come together properly, a _____ lip or palate may result

cleft

52

the temporary "jawbone" in the mandibular arch is known as

meckel's cartilage

53

Germ layer that derives digestive system

endoderm

54

Germ layer that derives thyroid gland

endoderm

55

Germ layer that derives epidermis

ectoderm

56

Germ layer that derives bones

mesoderm

57

Germ layer that derives brain

ectoderm

58

Germ layer that derives muscle

mesoderm

59

Germ layer that derives respiratory system

endoderm

60

Germ layer that derives lining of anterior two thirds of tongue

ectoderm

61

Arch/pouch/groove? eustachian tube

pouch I

62

Arch/pouch/groove? parathyroid glands

pouches III and IV

63

Arch/pouch/groove? Meckel's cartilage

arch I

64

Arch/pouch/groove? palatine tonsils

pouch II

65

Arch/pouch/groove? Eardrum

groove I and pouch I

66

Arch/pouch/groove? External meatus

groove I

67

What becomes cheeks

maxillary

68

What becomes forehead

frontal

69

What becomes mandible

mandibular

70

What becomes side of nose

lateral nasal

71

What becomes philtrum

median nasal/globular

72

What becomes sides of palate

maxillary

73

What becomes front of palate

globular