Chapter 3 - Chapter 3 how do chemicals produce...

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Chapter 3 how do chemicals produce psychological effects? Neurons are basic building blocks of the brain 100 billion nerve cells 100 trillion synapses sensory neurons – conveys messages to the brain motor neurons – activates organs and muscles interneurons – connect motor and sensory neurons neurons can heal typical neuron parts dendrites – receives messages enriching environment increases dendrites cell body (soma) axon – sends message to the next cell glial cells myelin sheath – fatty sheet, speed up conduction Dendrites → cell body → axon → next cell Action potentials – electrical impulse that surges along an axon, caused by an influx of positive ions require activation above resting threshold produce “all or nothing” response always have some intensity (strength) fire more often to communicate intensity absolute refractory - Synapse terminals don't touch synaptic gap
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Chapter 3 - Chapter 3 how do chemicals produce...

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