Regeneration Of Fibers Flashcards
0
Q
When can a soma be repaired?
What is the exception?
A
When the soma remains intact.
Except: CNS oligodendrocytes bear growth-inhibiting proteins to prevent regeneration.
1
Q
Why is it serious to damage a nerve cell body?
A
Neurons are amniotic.
2
Q
What is the form of degeneration called?
A
Wallerian Degeneration
3
Q
What occurs during Wallerian Degeneration.
A
The AXON becomes fragmented at injury site & macrophages will remove debris.
4
Q
What occurs during regeneration?
A
- Schwann cells: form regeneration tube and secretes growth factor.
- axons: regenerate via filaments at a rate of 1.5mm/day.
- Schwann cells form new myelin sheath.
