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Unformatted text preview: 1-23-08Chapter 3: Drugs and the Nervous SystemMost drugs have effects on neurotransmittersAll psychoactive drugs produce their effects by acting on nervous system tissueSome drugs may act by mimickingNeuronsA unique type of cell that can receive and transmit information electrochemicallyBasic Neuron TypesBipolar (interneuron)Unipolar (sensory neuron)Sensory neurons carry information from sense organs to the central nervous system (CNS)Neurons in the CNS process that information, interpret it, and then send commands to muscles12-15 billion neurons in cerebral cortex1 billion in spinal cordHuman nervous system has nearly 100 billion neuronsThey arent the only type of cell in the system.GliaCells that support the neurons in many waysThey provide insulation and remove waste products and foreign bodiesThey are 1/10ththe size of neurons, but about 1- times as numerous....
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This note was uploaded on 04/20/2008 for the course PSY 459 taught by Professor Marcizinski during the Spring '08 term at Kentucky.
- Spring '08