PSYC 3670 Lecture Notes - Lecture 2: Horseradish Peroxidase, Axon Hillock, Axon Terminal

• School: York University
• Department: Psychology
• Course: PSYC 3670
• Professor: Kristoffer Romero

Document Summary

* how parasympathetic & sympathetic a ect each organ = on exam, not quiz. Neurons: nerve cells, 100 billion in brain, each independent from one another. Synapse: (neuron doctrine) gap between neuron to other cell (10^15 synapses in brain) Neuron nucleus: contains dna, mitochondria for energy, ribosomes for proteins, etc. Dendrite: branches that receive info from other neurons (tree vs 1 branch - re ects complexity of info received) Cell body: (soma/somata) integrates info received to determine if it should send a signal. Axon: (nerve bre) conducts output info in form of electrical impulses/action potential. Axon terminals: (synaptic boutons) transmit neurons signals across synapse to other cell. 1. motoneurons: long axons transmit messages to muscles causing muscle contractions. 2. sensory neurons: gather sensory info (light, odour, touch) & di er in shape for each sense. 3. interneurons: neither sensory/moto, receive input & send output to other neurons (most of the neurons in the brain)