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Histology > Histology & Embryology Quiz on Chapter 3 > Flashcards

Histology & Embryology Quiz on Chapter 3 Flashcards

Green SG for quiz on Monday 9/30

1
Q

Name three adult structures that are derived from ectoderm

A

eyes, nose, tooth enamel, skin

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2
Q

Name two hormones produced by the placenta

A

estrogen and progesterone

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3
Q

Order of embryonic stages after the gametes form a union

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

Inner cell mass/_________

A

blastula

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5
Q

_________/gastrula

A

blastospore

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6
Q

notochord/_______

A

neurula

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7
Q

trophoblast/_______

A

blastula

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8
Q

_________/neurula

A

neuralfold

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9
Q

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

A

placenta

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10
Q

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

A

vitelline

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11
Q

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

A

3-4mm

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12
Q

the ___________ and ______ form the basis of the umbilical cord

A

allantosis

yolk sac

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13
Q

the placenta originates from the

A

chorion

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14
Q

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

A

amniotic cavity

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15
Q

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

A

yolk sac

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16
Q

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

A

epiblast layer

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17
Q

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

A

buccopharyngeal membrane

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18
Q

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

A

foramen ovale

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19
Q

the four phases of the menstrual cycle are

A
  1. follicular phase
  2. ovulation
  3. luteal phase
  4. menstruation
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20
Q

what are the three germ layers

A

ectoderm
mesoderm
endoderm

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21
Q

eyes come from which germ layer

A

ectoderm

22
Q

tooth enamel comes from which germ layer

A

ectoderm

23
Q

blood cells come from which germ layer

A

mesoderm

24
Q

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

A

migratory cells
mesenchyme cells
mesoderm layer

25
Q

a 3 week old embryo is _______ long

A

3-4 mm

26
Q

the buccopharyngeal membrane begins to develop

A

4 1/2 weeks

27
Q

the embryonic heart is seen as a

A

bulge

28
Q

which phase of mitosis is in the resting phase

A

interphase

29
Q

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

A

endometrium

30
Q

T/F

spindles present during mitosis are attached to centromeres

A

false

31
Q

T/F

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

A

false

32
Q

T/F

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

A

true

33
Q

T/F

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

A

true

34
Q

T/F

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

A

true

35
Q

T/F

smooth muscle is under conscious control

A

false

36
Q

T/F

DNA replication takes place during the G1 phase of the cell cycle

A

false

37
Q

T/F

fertilization takes place in the distal third of the uterine tube

A

true

38
Q

t/f

endoderm and ectoderm are the first two germ layers to develop

A

true

39
Q

t/f

tissues are the most susceptible to teratogens during the embryonic period

A

true

40
Q

t/f

melanocytes are derived from neural crest cells

A

true

41
Q

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

A

false

42
Q

t/f

the umbilical vein caries oxygenated blood

A

true

43
Q

t/f

the foramen ovale closes during the third week of prenatal life

A

false

44
Q

t/f

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

A

false

45
Q

t/f

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

A

true

46
Q

t/f

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

A

true

47
Q

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

A

neural folds

48
Q

the myotome produces the _______ of the body

A

muscles

49
Q

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

A

intramembranous

50
Q

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

A

yolk sac

Histology (8 decks)

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