Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Block 1 Week 3 > DEV (Highison): Embryonic period week 3 thru 8 > Flashcards

DEV (Highison): Embryonic period week 3 thru 8 Flashcards

1
Q

Embryonic period spans through what weeks?

A

three to eight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

embryonic period develops what two early systems

A

nervous system

and cardiovascular system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

by end of embryonic period, have ALL major organ systems begun to develop?

A

Yeah, but only MINIMALLY.

^^except the cardiovascular system which has developed extensively

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What appearance does the fetus have by the end of the eighth week?

A

it starts looking distinctly human

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the three phases of embryonic development?

A
  1. growth
  2. morphogenesis (development of form AND mass cell movements)
  3. differentiation which is the maturation of physiological processes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the TWO MAJOR subdivisions of ectoderm derivatives?

A
  1. neuroectoderm

2. epidermal covering of the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the process of neurulation?

A

early neural tube formation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the blocking of BMP4 do for neurulation?

A

It allows for the induction of neural plate by the NOTOCHORD and the PRECHORDAL PLATE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Neural plate invaginates to form ____?

A

the neural tube!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The CNS comes from?

A

The NEURAL TUBE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In what direction does the fusion of the neural tube proceed?

A

Cranially to caudally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the two nucleopores and when do they close?

A

Cranial nucleopore and caudal nucleopore; they close at day 25 and 27 respectively

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What’s a nucleopore?

A

An opening on the side of the neural tube; we got two, one on the cranial side and one on the caudal side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

a. Where do neural crests cells come from?
b. Where do they go?
c. And what do they do?

A

a. neural folds.
b. from neural folds, they migrate into mesenchyme
c. they make up the PERIPHERAL NERVOUS SYSTEM and MORE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What do neural crest derivatives differentiate to? JUST THROW AS MANY AS YOU CAN OUT THERE

A

**connective tissue and bone of THE FACE AND THE SKULL.
**CN nerves
C cells of thyroid
Conotruncal septum
Odontoblast
**DERMIS of FACE AND NECK
**Spinal (dorsal root) ganglia
**Sympathetic chain and preaortic ganglia
**Parasympathetic ganglia of GI
Adrenal medulla
***Schwann + glial cells
Ariachnoid and pia mater
melanocytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Ectoderm has two divisions–neuroectoderm and epidermal covering of body. T/F?

A

TRUE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The epidermal tissue of the body includes

A 
The skin!!!!!
 contains epidermis 
sweat glands, sebaceous gland
mammary glands anterior pituitary gland
hair, nails, enamel
internal ear
lens of eye and corneal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the FIVE mesoderm derivatives?

A 
Axial mesoderm
paraxial mesoderm
intermediate mesoderm
lateral plate mesoderm
mesodermal contribution to the chorion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Axial mesoderm has what three early developmental structures?

A
  1. prechordal plate (i think it eventually forms the vertebra)
  2. notochord, just helps folding and morphogeneisis
  3. caudal eminence, thing that sticks out of caudal region of early embryo (i think once the caudal neuropore closes)
20
Q

______ fodling happens in the axial mesoderm

A

cephalocaudal folding

21
Q

in cephalocaudal folding, the primitive streak and notochord establish what?

A
  1. cephalocaudal side
  2. R/L side
  3. dorsal and ventral surface
22
Q

in cephalocaudal folding, rapid head and tail growth cause the embryo to move in what direction?

A

curl toward ventral surface

23
Q

Paraxial mesoderm has two sets of somitomeres. where are they located?

A

somitomeres in the head

AND in the body

24
Q

How many somitomeres do we have in the head? what do we call them?

A

we got 1-7 + neural plate.
they’re called neuromeres
they do wonderful things

25
Q

What are body somitomeres called?

how do they move?

A

somites.

occipitally to caudally

26
Q

How can you approximate embryo age?

A

with the position of the somites

27
Q

What forms the sclerotome?

and what does the sclerotome make

A

somites form sclerotome.

it makes vertabrae, ribs, and some of the base of skull

28
Q

What forms the dermatomyolome? and what are the two dermatomyolome parts and what do these two parts make?

A

somites form the dermatomyolome.
dermatome —-> makes dermis of skin
myolome —> makes skeletal muscles of body and limbs

29
Q

Why are dermatomyolomes still clincally relevant in adulthood?

A

each one of them RETAINS own segmental innvervation from origin

30
Q

Intermediate mesoderm forms most organs in _______ systems

A

genitoruinal

31
Q

Intermediate mesoderm forms what three organ cell layers in genitourinal systems?

A
  1. connective tissue
  2. smooth muscle
  3. epithelial linings
32
Q

In the UG organs, what provides the remaining epithelial lining that the intermediate mesoderm can’t provide?

A

The ENDODERM

33
Q

The lateral plate mesoderm helps form the ______ cavity

A

interaembryonic

34
Q

Does the lateral plate mesoderm split in the head?

A

Nope

35
Q

What two arms splits up into what two segments (arms in his PPT)?

A
  1. somatic

2. splanchnic

36
Q

The somatic arm of the lateral plate mesoderm makes up the connective tissue and smooth muscle of what three structures?

A
  1. body wall
  2. bones.
  3. cartilage of limbs and limb girdle
37
Q

The splanchnic arm of the lateral plate mesoderm makes up the connective tissue and smooth muscle of what two regions?

A

ALL of the ENDOderm line organs

and ALL of the tissues of cardiovascular system

38
Q

Regarding the mesodermal contribution to the chorion:

DURING THE FOLDING PROCESS, ENDOderm is formed into _______?

A

epithelial tube– which runs along body length!

39
Q

Regarding the mesodermal contribution to the chorion:

the ENDOderm tube forms_______?

A

the epithelial lining of the GI tract

40
Q

Regarding the mesodermal contribution to the chorion:

the mesoderm and ENDOderm collaborate to form ________?

A

SPECIFIC GI organs

41
Q

mesodermal contribution to the chorion forms epithelial components of what organs?

A

pharyngeal buds, lung buds, liver, pancrease, and gall bladder

42
Q

so we talked about cephalocaudal folding previously, what is the other kind of embryonic folding?

A

lateral folding!!!

43
Q

How does lateral folding occur?

and what structure does it make?

A

ENDOderm folds in embryo.

forms a NARROW TUBE structure

44
Q

in lateral folding, the mesoderm continues to separate out what two things?

A

ectoderm from endoderm

45
Q

at this point, what encircles embryo completely?

A

the ectoderm forms outer covering of embryo

and then the amniotic cavity is around that

Block 1 Week 3 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions