student outline Chapter 3

student outline Chapter 3 - Chapter 3 Neuroscience and...

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Chapter 3 Neuroscience and Behavior Neurons *Dendrites— “tree” *Cell body— “soma” *Axon— “myelin” Neurons *Glial cells *support cells *Synapse *electrical to chemical *100 billion cells *100–500 trillion synapses Neurons *Major types of neurons *sensory *motor *interneurons
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Electrical Signaling *Conduction (within a neuron) *Transmission (between neurons) *Resting potential *natural electric charge *concentration of ions inside and outside cell Electrical Signaling- Action Potential *Action potential *Threshold *All-or-none *myelin and nodes of Ranvier *refractory period
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Chemical Signaling- Transmission *Electrical to chemical *Terminal buttons *Neurotransmitters *Receptors *Lock and key *Reuptake Neurotransmitter Types Acetylcholine Dopamine GABA (gamma-aminobutyric acid) Norepinephrine Serotonin
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Neurotransmitters- Chemicals that mimic or block them Most drugs have their effects by enhancing or interfering with synaptic transmission! *Agonist (Prozac, LSD, amphetamines, cocaine)
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student outline Chapter 3 - Chapter 3 Neuroscience and...

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