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

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Presentation transcript:

The Neuron March 08, 2016 AP Psych Ms. Sallo

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

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

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

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)

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???

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!