1. The Neuron
March 08, 2016
AP Psych Ms. Sallo

2. The Neuron Basic building block Always at work Tells us what to do
Acts as the messenger cell

3. Cell Body Dendrites receive stimuli
Looks like fingers-> reaching out to receive the message
Axon sends out the message
Myelin sheath is a protective coating
Insulates the axon
Speeds up the message

4. 3 types of neurons Afferent (to brain) Sensory Interneurons
Connect to other neurons
Efferent (away from brain)
Motor
Brain and spinal cord
Sensory Afferent Motor Efferent

6. Neural impulse How is a message sent???
A message is sent with an action potential
Depolarization- neural firing if threshold is hit
All or none
The membrane starts to break down potential for action
Ends at the axon terminal (aka synaptic knob)

8. The Synapse Axon terminal Synaptic space/cleft
Dendrite or cell body of succeeding neuron
How does the message travel from the axon terminal to the succeeding neuron???

10. Neurotransmitters Act like hormones
Housed in synaptic vesicles within the axon terminal
Excitatory
Acetylcholine, norepinephine
Create
Inhibitory
Serotonin, dopamine, endorphins
Stop or slow down
Drugs work on neurons!