PSYC 1010 Chapter 3: CHAP 3.docx

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Jill Bee Rich

Document Summary

Neuron basic link in communication to other neurons. Dendrites: branching structure that receives signals from other cells. Axon: fiber that carries signals away from the other cells. Myelin sheath: insulating material that encases some axons. Terminal buttons: small knobs that secret neurotransmitters (messenger) activates the neighboring neurons. Synapse: place where info is transmitted from one neuron to another. Resting potential: neuron at rest, stable negative charge when inactive. Action potential: very brief shift in neurons charge that travels along an axon (charge less negative more positive) Absolute refractory period: minimum length of time after an action potential during which another action potential cannot begin. Refractory period: threshold a neuron can fire is elevated a more intense s is required for action potential. All-or-none: a neuron either fires or doesn"t fire, action potential is all the same when it does fire. Synaptic cleft: gap b/w terminal button and neuron and cell membrane of another neuron.