Embryo from Review

Question 1

induction

Answer 1

ectoderm becomes neural plate

Question 2

neurulation

Answer 2

neural plate becomes neural tube

-forms CNS

Question 3

anterior/cranial neuropore closes at day ___

-failure = ______

Answer 3

anterior/cranial neuropore closes at day 25

-failure = ANENCEPHALY

Question 4

posterior/caudal neuropore closes at day ___

failure = _________

Answer 4

posterior/caudal neuropore closes at day 27

failure = SPINA BIFIDA

Question 5

anencephaly due to failure of:

Answer 5

cranial neuropore to close

Question 6

spina bifida due to failure of:

Answer 6

caudal neuropore to close

Question 7

neural crest is basis of ________

Answer 7

neural crest is basis of PNS, ANS

Question 8

cells from neural crest

Answer 8

• schwann cells
• dorsal root ganglia
• sensory ganglia of cranial nn.
• autonomic ganglia
• sympathetic neurons
• parasympathetic ganglia of cranial nerves
• enteric neurons in gut
• chromaffin cells of adrenal medulla
• melanocytes

Question 9

prosencephalon

Answer 9

forebrain

• telencephalon (cerebral hemis)
• diencephalon (thalamus, hypothal, optic n)

Question 10

mesencephalon

Answer 10

midbrain

Question 11

rhombencephalon

Answer 11

hindbrain

• metencephalon (pons, cerebellum)
• myelencephalon (medulla)

Question 12

vesicle formation refers to

Answer 12

forming lobes/parts of brain/brainstem

Question 13

lissencephaly

Answer 13

malformation of neuronal and glial proliferation

Question 14

polymicrogyria

Answer 14

malformation of neuronal cortical organization

Question 15

heterotopias

Answer 15

malformation of neuronal migration

Question 16

telencephalon

Answer 16

part of prosencephalon

cerebral hemispheres

Question 17

diencephalon

Answer 17

part of prosencephalon

• thalamus
• hypothalamus
• optic n

Question 18

metencephalon

Answer 18

part of rhombencephalon

• pons
• cerebellum

Question 19

myelencephalon

Answer 19

medulla