PSY100H1 Lecture Notes - Lecture 5: Axon Hillock, Acetylcholine, Autonomic Nervous System

• School: UTSG
• Department: Psychology
• Course: PSY100H1
• Professor: Dan Dolderman

Document Summary

Receive information from other neurons and transmit towards the cell body. Neuron is a communication device, transfers information forward. Physiological: major contributions of physiological systems; e. g. , autonomic nervous system, hormones, etc. What is the action potential? depolarizing a micro-section of the membrane at the axon hillock, setting in motion a domino- like effect of ion cascades. Transmit information forward to other neurons through release of neurotransmitters. Fusion of vesicle to cell membrane, releasing nts. Wave of ion cascade traveling down the axon. Keeps the neuron alive and determines whether it will fire. Electrical regulation because of ion concentration difference across cell membrane (net. More negative charge, less negative charge, tug or war. Long fiber that conducts impulses away from the cell body. The ion gates close, called absolute refractory period. Key neurotransmitters (must know top 6, will be tested for sure) Glutamate: excitatory: cognitive, seizures, motivation (opposite of gaba, gluta brings everything up, gaba brings everything down)