PSY397H5 Lecture Notes - Esterase, Ligand-Gated Ion Channel, Microtubule
Document Summary
Things not covered in class from textbook, won"t be on the test. 95% will be from what we covered from class. It is the flow of electrons from negatively charged place to positively charged place. Electrons function as a wave and particle at the same time. Neurons generate electricity by using charged atoms. Opening and closing channels depends on the property of the protein channel. Outside have more sodium (more than the total potassium), inside has more potassium and negatively charged large proteins. Sodium-potassium pump results and maintains in the resting membrane potential. Transfers 3 sodium ions to the outside with 2 potassium ions to the inside. Working against the membrane potential, therefore uses atp (provides energy by phosphorylation of protons). When electricity arrives, sodium channels open when the cell gets more positive (depolarized). Electricity doesn"t travel easily in wet biological environments, therefore it is not passive. The membrane doesn"t conduct electricity, therefore myelination occurs for insulation.
