Neurulation and Ectoderm Derivatives

Question 1

rostral neuropore closes at day

Answer 1

25

Question 2

caudal neuropore closes at day

Answer 2

28

Question 3

spinal bifida occulta

Answer 3

neural tube closed but was slow, vertebral arches don’t close correctly. normal

Question 4

meningocele

Answer 4

fluid filled sac, vertebrae didn’t form arch. cyst-like structure covered in meninges. may or may not be normal

Question 5

meningomyelocele

Answer 5

neural tube is in cyst, vertebrae is not in the right spot, covered with meninges. motor and sensory defects

Question 6

myelocele (myeloschisis)

Answer 6

neural tube did not close at all. high risk of infection. motor and sensory defects

Question 7

fetal alpha protein

Answer 7

can diagnost open neural tube congenital defects via amniocentesis

Question 8

meninx primitiva

Answer 8

mesoderm in origin (sclerotome), neural crest cells migrate and mingle

Question 9

pachymeninx

Answer 9

dura mater–mesoderm

Question 10

leptomeninges

Answer 10

arachnoid and pia mater–neural crest

Question 11

ectopia cordis

Answer 11

heart forms outside of body, folding issue