Action Potential Flashcards
1
Q
if depolarization is great enough, the postsynaptic neuron will reach action potential ________ and initiate an action potential.
A
threshold.
2
Q
“Threshold is actually…
A
a property of voltage gated ion channels.
3
Q
voltage gated ion channels open at a threshold of about ___mV
A
-50mV
4
Q
Which VG ion channels are opening during the “rising phase”
A
Na + ion channels.
5
Q
Schwann cells
A
PNS
6
Q
Oligodendrocytes
A
CNS
7
Q
Action potentials propagate in a _______ manner.
A
saltatory
8
Q
The electrical signal diffuses passively between _______
~nodes regenerate the signal.
~allow the axon membrane to briefly contact extracellular space
A
nodes of Ranvier
9
Q
Axons wrapped tightly by ______ cells : myelination
A
glial
