PSY397H5 Lecture Notes - Lecture 4: Myelin, Neuroglia, Ion Channel
Document Summary
Test: focus on what we covered in class. Works like a wave and a particle at the same time. Electrons can spend most of their time in one part rather than other parts, thereby creating a charge. Inside the cells membrane is hydrophobic, and outside is hydrophilic. Protein channels that allow ions to go through. Difference in charge across the membrane, inside is more negative that outside. More potassium in the inside and more sodium on the outside, the proteins inside create the negative charge. Ie hydrogen atom that is positively charged, so proteins are negatively charged. Number of sodium ions outside is more than potassium ions in the inside, therefore the net charge is more negative. This charge difference is facilitated by the sodium/potassium pump. The channel transfers 3 sodium ions to the outside and two potassium to the inside.
