Midterm Practice Flashcards
1
Q
Name two factors that contribute to the degradation of ESPS’s as they travel.
A
Distance from soma
Internal resistance
Membrane resistance/conductance
2
Q
Name two ways that the rate of AP propagation can be increased.
A
Increased axonal diameter, increased membrane resistance, myelination
3
Q
Explain why the AP only goes in one direction
A
V-gated N’a+ channels inactivate as the potential becomes more positive. They cannot open again until they are deinactivated. —> refractory period prevents bidirectional propagation
4
Q
What is the function of astrocytes?
A
Regulate the extra cellular space around neurons
5
Q
What is the function of microglia?
A
Immune cells
6
Q
What is the function of ependymal cells?
A
Make CSF
