PSYC 1315 1st Edition Lecture 8 Outline of Last Lecture I Biological Foundations of Behavior Outline of Current Lecture I Electrochemical Transmission a Electrical impulses and chemical messenger systems b All brain and nervous system to work as an information processing system II Pathways in the Nervous System a Nerves carry information b Afferent Nerves sensory nerves carry information to your brain c Efferent Nerves motor nerves carry the brain s output III Divisions of the Nervous System a CNS b PNS IV Central Nervous System a Brain and Spinal Cord V Peripheral Nervous System a Somatic sensory and motor nerves transmitting information toward the brain b Autonomic nerves in charge of more autonomic needs Parasympathetic system calms the body down rests and digests Sympathetic system arouses the body fight or flight VI Nervous System Cells a Glial cells b Neurons VII The Neuron a Nerve cells specialized for processing info b Basic units of nervous system VIII The Neural Impulse a Direction of information Dendrites Cell body Axon Terminal buttons release of chemicals Synapse Dendrites IX Resting Potential a Slightly negative charge b The ions are distributed inside and outside the cell X Neural Transmission XI XII XIII XIV a Action potential brief wave of positive electrical charge along the axon b Causes release of chemicals at terminal buttons into the synapse Neurotransmitters a Chemicals that transmit carry information across the synaptic gap Speed of Transmission a Thicker the axon Faster the message travels Communication Between Neurons a Action potential reaches end of axon b Travel to terminal buttons c Synapse d Electrical energy opens terminal buttons e Message CHEMICALLY passed via the neurotransmitters Drugs and Neurotransmitters a Agonists mimic the action of neurotransmitters b Antagonists oppose or block the action of neurotransmitters
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