PSYC 2560 Lecture 7: Sept 23ch4

• School: University of Windsor
• Department: Psychology
• Course: PSYC 2560
• Professor: Abeare

Document Summary

Scanning electron micrograph of a neuron: receiving thousands of inputs but only has one output. Neurons: multipolar (motoneuron): multiple processes(axon, dendrite, etc) coming off of it, unipolar (sensory neuron): one process coming off of it, bipolar (interneuron): two processes coming off of it (one going in, one coming out) Interneurons: bipolar neurons are sometimes called interneurons, connecting two neurons. Groups of neurons together in the central nervous system are the nuclei, in the peripheral nervous system are called ganglia. Glial cells: oligodendrocytes, cns (central nervous system, myelinate some axons. Basic definitions: action potential: a brief electrical impulse that is discharged down an axon in order to send information. Ion: a charged molecule (na+ cl-: can be opened or closed, changes in voltage. Ionic basis for the -70mv resting potential: the balance of two forces concentration or the repulsion of particles with the same charge. Sodium-potassium pump- active force that exchanges 3 na+ inside for 2k+ outside.