Neural Transmission Flashcards
study neural transmission
1
Q
direction of impulse is
A
dendrites -> nucleus -> cell body -> axon -> axon terminals
always in one direction
2
Q
motor neurons move
A
signals away from from brain
3
Q
A
4
Q
sensory neurons move
A
signals to brain
5
Q
interneurons move
A
in brain
most # of neurons
6
Q
action potential
A
nerve impulse, electrically charged atoms
7
Q
depolarization
A
positive ions flood the axon
8
Q
polarization
A
negative inside and positive outside
resting potential
9
Q
all-or-nothing principle
A
neurons will or won’t fire, always with the same intensity
10
Q
refractory period
A
pause between firing, can’t fire again until recharged
11
Q
threshold
A
level of excitatatory neurotransmitters that a neuron must absorb prior to firing
12
Q
synapse
A
gap between terminals
13
Q
reuptake
A
excess neurotransmitter is left in synapses is then recollected
