PSY100Y5 Lecture Notes - Axon Hillock, Membrane Potential, Mesolimbic Pathway

• School: UTM
• Department: Psychology
• Course: PSY100Y5
• Professor: Dax Urbszat

Document Summary

Graded potentials stimulation of the nerve membrane can open ion channels in the membrane: na+ ions flowing in will depolarize the membrane (movement from 70mv to o say 60mv) K+ ions flowing out of the membrane will hyperpolarize the membrane (-70mv to say 90mv) Neurotransmitters acetylcholine (ach: memory and learning don"t have to build the whole road, just have to repair it o o o o sleep and dreaming disruptions in the ach process are responsible for. Alzheimer"s and dementia necessary to send messages about motor movement agonistic: mimic neurotransmitters antagonistic: block neurotransmitters fills up all the receptor sites and blocks it from receiving ach dying from paralyzation. Monoamines epinephrine and norepinephrine ability to pay attention and stay focussed disruptions in the norepinephrine depression/bipolar disorder too much: manic episodes, not enough: depression. But mao deactivates all the neurotransmitters, not just norepinephrine epinephrine: released during fight or flight response system adrenaline o serotonin dopamine.