Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
neural tube is formed by fusion of ___
|
neural folds
|
|
closure of neural tube starts at ___ and proceeds ___ly
|
future cervical region
craniad and caudad |
|
closure of anterior and posterior neuropores occurs at ___th week
|
4
|
|
incomplete closure of caudal neuropore causes ___
|
spina bifida
|
|
incomplete closure of cranial neuropore causes ___
|
anencephaly
|
|
2 regions of (transverse section through) neural tube
|
basal plate
alar plate |
|
basal plate gives rise to ___
alar plate gives rise to ___ |
motor nerves
sensory nerves |
|
basal and alar plates are separated by ___
|
sulcus limitans
|
|
CNS is initially ___ segments, then ___ segments
|
3
5 |
|
3 segments of early CNS
|
prosencephalon
mesencephalon rhombencephalon |
|
5 segments of mature CNS
|
telencephalon
diencephalon mesencephalon metencephalon myelencephalon |
|
telencephalon becomes ___ (3)
|
cerebral cortex
white matter basal ganglia |
|
diencephalon becomes ___ (5)
|
epithalamus
thalamus hypothalamus neurohypophysis subthalamus |
|
metencephalon becomes ___ (2)
|
pons
cerebellum |
|
myelencephalon becomes ___
|
medulla oblongata
|
|
3 kinds of neural tube cells
|
neuroepithelium
neural crest cells mesenchyme |
|
3 kinds of neuroepithelial cells
|
neuroblasts
glioblasts ependymal cells |
|
glioblasts become ___ (2)
|
astrocytes
oligodendrocytes |
|
neural crest cells become ___ (7)
|
sensory ganglia
ANS ganglia enterochromaffin cells schwann cells leptomeninges melanocytes odontoblasts |
|
2 kinds of sensory ganglia derived from neural crest cells
|
CN ganglia
dorsal root ganglia |
|
CNs with neural-crest derived sensory ganglia
|
V
VII IX X |
|
enterochromaffin cells are aka
|
amine precursor uptake and decarboxylation (APUD)
|
|
mesenchymal neural tube cells become ___
|
microglia
|
|
myelination in CNS is by ___
|
oligodendrocytes
|
|
myelination in PNS is by ___
|
schwann cells
|
|
an oligodendrocyte myelinates ___ (#) axons. an schwann cell myelinates ___ (#) axons.
|
many (>50)
1 |