PSYCO104 Lecture Notes - Lecture 5: Endorphins, Neurotransmitter Receptor, Spasm

• School: University of Alberta
• Department: Psychology
• Course: PSYCO104
• Professor: Geoff Hollis

Document Summary

Much like the battery, neurons have an inside and outside charges. By creating a difference, it will later on allow neurons to carry the electrical signal. Observation 1: without any outside disturbance, a system tends to go towards equilibrium. Any sodium outside stay outside and the inside ones stay inside. The sodium potassium pump: three na ions from inside bind and two k from outside. Because of this pump, we get all the sodium ions being pumped out and potassium ions being pumped in and overtime the outside will have a higher positive charge outside than inside. Inside the cell membrane, there are anions, because they are inside the cell membrane they have a slight attractive force to draw the potassium in. Everything outside is positively charges, these anions are going to repel each other: pump, potassium inside the cell membrane, sodium moves outside. This difference in charge thus creates an electrical potential.