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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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- Spring '07
- Psychology, electrical gradient