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Unformatted text preview: Electrical gradient and ion concentrations prepare neuron to respond rapidly to stimulus o The negatively charged proteins inside the cell maintains the negative charge inside the cell. o Potassium tends to flow inside the cell because of the electrical gradient The previous part of the nuron is in the the state of hyperpolarization and is really negative and would require quite a bang to reach the threshold o The distribution of ions is much less negative because the potassium ions are outta there o So the action potential travels in one direction o Once the terminals are reached, the calcium channels Ca++ open Required for exocytosis Calcium binds to actin and myosin and the neurotransmitters are released...
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This note was uploaded on 05/05/2009 for the course PSY 301 taught by Professor Pennebaker during the Spring '07 term at University of Texas at Austin.
- Spring '07