repolarization

repolarization

cell returns to resting state

neuron is

NOT transmitting info

polarized

inside is MORE NEG than outside

sodium outside cell

overall POS charge

potassium INSIDE

overall NEG charge

ion pumps begin

working, transporting na out and k in (NOT KIN) keeps cells polarized

NOT?

KIN

all-or-none

if enough stimulation reaches neuron, neuron fires. (vise versa)

a neuron will fire at the same strength and same speed

EVERY TIME

neurons rate of AP speed

2-200 mph

refractory period

period of time in which a neuron cannot fire again after have been just fired

neurons can fire every

millisecond

seizures occur when

a large group of neurons fire together in an uncoordinated way (neurons are NOT supposed to fire)

brainwaves

recordines of neurons firing (put elecrodes on scalps, records elect activity)

brainwaves look different when awake vs

diff stages of sleep