Histology & Embryology Quiz on Chapter 3 Flashcards Preview

Histology > Histology & Embryology Quiz on Chapter 3 > Flashcards

Flashcards in Histology & Embryology Quiz on Chapter 3 Deck (50):
1

Name three adult structures that are derived from ectoderm

eyes, nose, tooth enamel, skin

2

Name two hormones produced by the placenta

estrogen and progesterone

3

Order of embryonic stages after the gametes form a union

1. zygote
2. morula
3. blastula
4. gastrula (3 germ layers)
5. neurula

4

Inner cell mass/_________

blastula

5

_________/gastrula

blastospore

6

notochord/_______

neurula

7

trophoblast/_______

blastula

8

_________/neurula

neuralfold

9

the _______ and umbilical cord are responsible for fetal respiration, nutrition and waste removal

placenta

10

prior to development of the vascular system, the _____ system provides nutrients to the embryo

vitelline

11

by 3 weeks the embryo is about _____ from the top of the head to the tail area

3-4mm

12

the ___________ and ______ form the basis of the umbilical cord

allantosis
yolk sac

13

the placenta originates from the

chorion

14

what cavity of the blastula is the precursor for the neural tube

amniotic cavity

15

what cavity of the blastula is the precursor for the GI tract

yolk sac

16

the primitive streak puts pressure on what layer in the bilaminar disc to initiate gastrulation?

epiblast layer

17

what membrane forms at the cephalic end of the bilaminar disc?

buccopharyngeal membrane

18

what foramen in the heart diverts blood away from the pulmonary arteries and into the left atrium in the embryo and fetus

foramen ovale

19

the four phases of the menstrual cycle are

1. follicular phase
2. ovulation
3. luteal phase
4. menstruation

20

what are the three germ layers

ectoderm
mesoderm
endoderm

21

eyes come from which germ layer

ectoderm

22

tooth enamel comes from which germ layer

ectoderm

23

blood cells come from which germ layer

mesoderm

24

what cells appear in response to this pressure? what is the course to gastrulation

migratory cells
mesenchyme cells
mesoderm layer

25

a 3 week old embryo is _______ long

3-4 mm

26

the buccopharyngeal membrane begins to develop

4 1/2 weeks

27

the embryonic heart is seen as a

bulge

28

which phase of mitosis is in the resting phase

interphase

29

the _____ of the uterus provides an ideal environment for the implantation and growth of the embryo

endometrium

30

T/F
spindles present during mitosis are attached to centromeres

false

31

T/F
six weeks after conception, the stage of development is referred to as the period of fetus

false

32

T/F
the nucleus contains diffuse DNA until cell division, when the 23 pairs of chromosomes become condensed

true

33

T/F
the cell may contain more than one nucleolus during active protein synthesis

true

34

T/F
the information in mRNA is translated by ribosomes located on the surface of the rough endoplasmic reticulum

true

35

T/F
smooth muscle is under conscious control

false

36

T/F
DNA replication takes place during the G1 phase of the cell cycle

false

37

T/F
fertilization takes place in the distal third of the uterine tube

true

38

t/f
endoderm and ectoderm are the first two germ layers to develop

true

39

t/f
tissues are the most susceptible to teratogens during the embryonic period

true

40

t/f
melanocytes are derived from neural crest cells

true

41

t/f
dermatome cells arise from the sclerotome and migrate to surround the notochrod and spinal cord, which form the spinal column

false

42

t/f
the umbilical vein caries oxygenated blood

true

43

t/f
the foramen ovale closes during the third week of prenatal life

false

44

t/f
the foramen ovale is an opening between the right and left ventricle of the heart

false

45

t/f
prior to development of the vascular system, the vitelline system provides nutrients to the embryo and fetus

true

46

t/f
striated or voluntary muscle uses acetycholine as the neurotransmitter at the neuromuscular junction

true

47

neural crest cells migrate from the ______ _______ prior to fusion and closure of the neural tube

neural folds

48

the myotome produces the _______ of the body

muscles

49

_____________ bone formation occurs by condensations of mesenchymal cells without a cartilaginous scaffold

intramembranous

50

blood cells begin to form in the __________ at 2 1/2 weeks of development

yolk sac