PSYC 211 Lecture Notes - Lecture 4: Chemical Synapse, Axon Terminal, Extracellular Fluid

• School: McGill University
• Department: Psychology
• Course: PSYC 211
• Professor: Yogita Chaudasama

Document Summary

Transmission of the messages from one neuron to another through a synapse. Neurotransmitter-depenedent ion channel that has its own binding site. When a neurotransmitter attaches to it the ion channel opens (ionotropic receptor) These receptors are sensitive to a neurotransmitter called acetylcholine (contains sodium channels) When these channels are open, sodium enters the cell and depolarizes the membrane o. They involve steps that require the cell to expend metabolic energy. Are located in close proximity to another protein attached to the membrane (g- protein) Postsynaptic potential (psp: epsp: o sodium-potassium channels keep na+ outside the cell o when sodium channels are opened, the influx of na+ causes a depolarization. Ipsp o o potassium is +ly charged o. Cl- channels will permit cl- to enter the cell thus neutralizing the epsp o cl- can also cause ipsps. The interaction of the excitatory and inhibitory synapses on a particular neuron o.