PSYCH101 Lecture Notes - Lecture 9: Peripheral Nervous System, Multiple Sclerosis, Neuroglia

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH101
• Professor: Paul Wehr

Document Summary

Nerve cells (neurons) - basic unit that make up the nervous system. Nervous system - central nervous system (cns) and the peripheral nervous. Relay information (electrical impulses) throughout the nervous system: send messages to other neurons, organs, muscles, and glands, receive messages from other neurons and sensory cells, integrate information. Each nerve cell can communicate up to 1000 other partners - some are excitatory (fire ap), and some are inhibitory. Compose 90% of all cells in nervous system. Astrocytes facilitate formation of synapses in brain (ap) support staff . Dendrites - receive information from other neurons or sensory organs. Axon - connects neuron to other neurons further downstream. Multiple sclerosis (ms) - loss of sensation, paralysis, poor coordination (as a result of myelin sheath deterioration) Carry from 1 place to another as quickly as possible. Synaptic vesicles pouches where individual neurotransmitters are stored. Synaptic cleft gap between pre and post-synaptic neuron in which neurotransmitters fall.