Biopsychology PART 1 Reading assignment Textbook Chapter 3 pp 84 91 Objectives 1 Know the parts of the neuron and their function dendrites cell body axon axon terminals synaptic vesicles synapse Neuron nerves cells in nervous system that are specialized for communication with other cells What carry how we are feeling and how we behave Basic building block of nervous system 100 billion in the human brain 2 What kind of transmission occurs within a neuron How does communication occur between neurons Know the process and order of steps of neurotransmission Transmission within neuron is electrical Communication between neurons is chemical 3 What are neurotransmitters What is the Lock and Key model and how does it relate to neurotransmitters Neurotransmitters specialized chemical messengers Lock Key Receptor sites are specific to cetain types of neurotransmitters 4 What are psychoactive drugs How do they relate to neurotransmission Psychoactive drugs Affect mood arousal behavior Use the same receptor sites as NTs 5 What are glial cells What are some of the functions of glial cells discussed in class Glial Cells non neuronal cells throughout nervous system Connect thousands of neurons Provide many different support functions Parts of the Neuron Cell body AKA soma central region of neuron Manufactures new components for cell Contains nucleus brain of the cell Dendrites branchlike extensions that receives signal from neighboring cells Unique to neurons Axon long tail like portion specialized to send signals to other cells Myelin Sheath fatty tissue wrapped around the axon that insulates and speeds up neural signal Axon Terminal knoblike structure at ends of axon Contain synaptic vesicles spheres that contain neurotransmitters NT Neurotransmitters specialized chemical messengers
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