HLTHAGE 1CC3 Lecture Notes - Lecture 11: Neuroglia, Resting Potential, Neural Development
23 Mar 2017
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**an excess of neurons do not form proper synaptic connections** receptive zone > axon > terminal ends > receptive zone. Glial cells: provide structure + insulation + nutrition. Unit 3: action potential: resting potential > Leaky channel = always allows k+ - maintains resting potential. Protein mol inside = keeps cl- outside the cell. Na+ is closed = low concentrations of na+ but remain outside. Allowing the na+ ions that were outside the membrane to rush into the cell. electrical imbalance. The peak voltage of the action potential causes the gated sodium channels to close and potassium channels to open: k+ starts to be pushed out thru leaky potassium channels. Voltage gate is now open = more k+ = even more positive. Summary: na+ channels open, neuron becomes positive, voltage gated k+ opens, k+ ows out, na+ channels close, difference dips below -70mv, refractory period. After action potential sodium potassium pump helps get to threshold to re again:
