PSYC 1001 Lecture Notes - Postsynaptic Potential, Caudate Nucleus, Coca
7 Feb 2013
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Psyc 1001g neurons/nervous system jan 29th 2013. Development of nervous system in embryo (in the 2nd trimester glia plays hug role in brain. They compose the myelin sheath (fatty layer on the axon) and nervous system of the child) The electrochemical reaction that moves through the neuron: you can measure this. Ions: positive (sodium and potassium) and negative (chloride) charges. Neuron has a lot of negative within the membrane there is a gradient between the system and environment. Resting state = stable, negatively charges of -70 millivolts when at rest (resting potential: more negative in the inside when in this state. Stimulation causes cell membrane to open briefly: different neurons used for different funtions (touch, taste smell ect) Cell membrane in this case opens up. Chandelles state to open: cell becomes more positive in the inside, k+ goes in, na+ goes out. Positively charged sodium ions flow in sift in electrical charge travels along neuron.
