Biology (Brain) Flashcards
1
Q
Neuron
A
Basic cell of the NS
2
Q
Dendrites
A
receive incoming signals
3
Q
Soma
A
cell body (nucleus)
4
Q
Axon
A
AP travels down this
5
Q
Myelin Sheath
A
Speeds up signal down axon
6
Q
Terminals
A
Release NTs sends signal onto the next neuron
7
Q
Synapse
A
gap b/w neurons
8
Q
Action Potential
A
movement of sodium and potassium ions across a membrane sends an electrical charges down the axon
9
Q
All or None law
A
stimulus must trigger the AP past its threshold, but does not increase the intensity of the response
10
Q
Refractory Period
A
Neurons must rest and reset before it can send another AP. Sensory neurons- receive signals
11
Q
Afferent neurons
A
accept signals
12
Q
Motor neurons
A
sends signals
13
Q
Efferent neurons
A
signal exits
14
Q
Central NS
A
Brain and spinal cord
15
Q
Peripheral NS
A
rest of the NS
