PSYCH 101 Lecture Notes - Lecture 7: Autonomic Nervous System, Mood Disorder, Resting Potential

• School: UW
• Department: Psychology
• Course: PSYCH 101
• Professor: Michael W Passer

Document Summary

Neural membrane has ion channels which allows ions to pass through. Ions inside are slightly more negatively charged than that of surrounding fluid: neuron at rest is about -70mv. Neuron receives signal to act --> action potential o. Neuron is separated from surrounding fluid by a cell membrane o. Inner ions are more negatively charged than outer ions at rest (-70mv) After action potential, cell closes sodium channels and positively charged potassium ions flow into channels to make it more of a negative resting state. At rest: there are positive and negative ions. During action potential: positive sodium ions flow into axon. Inside of axon accumulates max levels of positive charge: positive potassium ions flow out of the axon. Action potential flows from axon to dendrites: when action potential reaches the axon terminal, it triggers release of neurotransmitters. When stimulated enough with messages from other neurons.