Psychology 1000 Lecture Notes - Lecture 7: Reflex Arc, Curare, Reuptake

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Synaptic transmission: explains the delay in response latency for a reflex arc (sherrington) Looked at neurotransmitters especially norepinephrine, dopamine, serotonin as they cause disorders. Cocaine: stimulates release of da, prevents re-uptake. Curare: blocks receptor sites for ach, all muscles stop working. Black widow venom: stimulates release of ach, increase heart rate and increase muscle movement. Botulism toxic: blocks release of ach, get sick as drug stays in system. Nicotine agonist (increases action at post synaptic membrane: stimulates receptor molecules duplicating effects of ach. Caffeine antagonist ( decreases action at post synaptic membrane: blocks adenosine receptor sites. Summary of neurons: all neurons fire i. e generate action potentials, all or none, intensity coded as frequency, excitatory neurons vs inhibitory neurons. Hyperpolarize (ipsp: epsp"s & ipsp"s are additive across space and time. Graded potentials: constant inhibition effectively raises thershold, a single neuron might synapse with many others. Slow one neuron down by interacting it with another inhibitory neuron.