Musculoskeletal

Question 1

what does the paraxial mesoderm form

Answer 1

Vertebral column + ribs
Dermis of the Back
skeletal muscles

Question 2

What does the lateral plate somatic mesoderm form

Answer 2

Limb bones (scapula clavicle innominate)
dermis of the ventrolateral trunk and limbs
sternum

Question 3

what is the dosrolateral region
what does it form

Answer 3

dermomytome
forms the dermis of the back and muscles of the limbs and trunk

Question 4

what is the ventromedial region
what does it form

Answer 4

sclerotome
forms the vertebral columns and ribs

Question 5

what type of mesnehcyme is the somite balls oringallly

Answer 5

segmented paraxial mesenchyme

Question 6

where is the Noggin and Sonic the Hedgehog from

Answer 6

notochord and neural tube

Question 7

what moves to surround the notochord and neural tube

Answer 7

scletomal

Question 8

what does dorsal sclertome form Vertebral

Answer 8

vertebral arch of the vertebraew

Question 9

hat does the ventral sclerotome surround the notochord and become

Answer 9

vertebral body

Question 10

how do they form the bone

Answer 10

condense and form the cartilage

Question 11

what is the von ebner’s fissure

Answer 11

the divdsion into a cranial and caudal portion of the sclerotome

Question 12

what forms the annulus fibrousus

Answer 12

mesenchyme between the developing vertebrae

Question 13

what does the notochord form

Answer 13

nucleus pulposus

Question 14

what is the skeletal muscle from

Answer 14

paraxial mesoderm

Question 15

what cells of what migrate ventrally DML + VLL

Answer 15

dorsomedial lip and ventrolateral lip of the demomyostome

Question 16

what does this form

Answer 16

dermatome - dermis of the back
myotome - muscle precuros

Question 17

where do some cells also go
why

Answer 17

VLL migrate to somatic layer to access developing limbs

Question 18

where does the dermatome migrate

Answer 18

ectoderm

Question 19

what does the dermatome join with
to form what

Answer 19

and with lateral plate mesoderm forms dermis of the back and limbs

Question 20

what does the myotome differeiante into

Answer 20

dorsally epimere
ventrally hypomere

Question 21

what does the epimere do

Answer 21

instrinic back muscles (closer to ears)

Question 22

what is this inverated by

Answer 22

dorsal rami of the spinal nerves

Question 23

what is the hypomere do

Answer 23

lateral and ventral muscles of the thorax and abdomen and limb muscles

Question 24

what is it innverated by

Answer 24

ventral rami of spinal nerves

Question 25

where do cells from the hypomere go

Answer 25

into developing limb buds

Question 26

what do these divide into

Answer 26

anterior and posterior condensations on either side of the develop limb bones

Question 27

what does the anterior condensation forms

Answer 27

Upper limb - flexor and pronator muscles
Lower Limb Flexor and adductor muscles

Question 28

what does the posterior condensations form

Answer 28

extensor and exntor for upper and lower limb (PEE)
PSA accountment the kind is abdicated - posterior supinator abductor

Question 29

what are the limb buds innverated by

Answer 29

primary rami of spinal nerves C5-T1 + L2-S3

Question 30

what do the outpouching of the limbs form

Answer 30

ventrolateral body walls

Question 31

what is the lateral plate mesoderm covered by

Answer 31

ectoderm

Question 32

what induces the AER

Answer 32

lateral plate moderm cell

Question 33

what is the progress zone

Answer 33

area of rapidly proliferating mesodermal cells

Question 34

what singal does the WNT7a induce

Answer 34

underlying mesenhyme to become dorsal in nature