development of nervous system

Question 1

development of 3 germ layers happens during

Answer 1

3rd week

Question 2

ectoderm–>

Answer 2

skin, nervous system

sweat glands

Question 3

mesoderm –>

Answer 3

muscles, bone, CT, urogenital system

Question 4

endoderm–>

Answer 4

lining of GI tract and airways

endocrine glands, liver, pancreas

Question 5

notochord derived from

runs in __ axis

Answer 5

mesoderm

cephalocaudal axis ventral to neural tube

Question 6

by end of 3rd week the lateral edges of ectoderm form

Answer 6

neural fold

Question 7

neural crest cells arise from ___

Answer 7

ectoderm and migrate away from neural tube

Question 8

neural crest cells give rise to

Answer 8

cell bodies outside CNS

Question 9

____ make up neural tube and give rise to ___

Answer 9

neuroepithelial cells

brain and spinal cord owe

Question 10

anencephaly

Answer 10

absence of major portions of brain and skull

Question 11

spina bifida

Answer 11

compromised lower limb and/pr bowl and bladder function

Question 12

3 primary brain vesicles

Answer 12

prosencephalon(forebrain)
mesencephalon(midbrain)
rhombencephalon(hindbrain)

Question 13

5 secondary brain vesicles

Answer 13

telencephalon 
diencephalon 
mesencephalon
metencephalon
myelencephalon

Question 14

hindbrain becomes

Answer 14

pons, medulla, cerebellum

Question 15

alar plate

Answer 15

sensory cells (dorsal)
becomes dorsal gray of spinal cord and sensory nuclei of cranial nerves

Question 16

basal plate

Answer 16

motor cells(ventral)
becomes motor neurons of ventral spinal gray and motor nuclei of CN

Question 17

in spinal cord sensory fibers enter via ___ and motor fibers emerge via ___

Answer 17

dorsal roots

ventral roots

Question 18

notochord secretes

Answer 18

sonic hedge hog

Question 19

once neural tube is formed neuroblasts can become

Answer 19

glial cells or neurons