PSY100Y5 Lecture Notes - Lecture 3: Myelin, Axon Terminal, Neuroglia
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PSY100Y5 Full Course Notes
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Chapter 3: communication in the nervous system, nervous tissue: the basic hardware, 2 major categories for cells in nervous system, glia cells found throughout the nervous system that provide structural support and insulations for neurons. Help maintain the chemical environment of the neurons: nuerons- the individual cells in the nervous sytem that receive, integrate, and transmit info. Insulating material, from glial cells, that encases some neurons. Speeds up transmissiono of info: multiple scleroris due to deterioration of myelin sheath. Terminal buttons small knobs that secrete chemicals called neurotransmitters. At end of axons in clusters: synapse point at which neurons connect. Good table 3. 1 common nuerotransmitters and their functions: acetylcholine (ach, only transmitter between motor neurons and voluntary muscles, contribute to attention, arousal, memory, agonist chemical that mimics the action of a neurotransmitter produce. Psp after binding to receptor sites (i. e. nicotine): antagonist opposes the action of a neurotransmitter.
