17 - Nervous System -Well designed to process things on a...

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Nervous System -Well designed to process things on a short-term basis, change physiological function -Comprised of 2 types of cells: neurons , which have 2 states ( electrical ) --> neurotransmitters released (8) which interact with receptors (100's of kinds); but are slow (500 bit/sec); as a consequence of their activity, release specific chemicals in order to interact with one another -Individual neurons wired together ( circuits ) which are organized into structures which are then wired together (A, B, C, D) to form systems -When we collectively use systems, we give rise to emergence (doesn't exist or have a physical form in the brain, which can shift you out of emergent states) --> at the most basic level, there are only neurons; at the highest level, which overrides all other components is plasticity which means the ability of the NS to change for the function and consequence of experience -Other type of cell in the NS is called glia; at birth, humans had 200 billion neurons, 20's have about 100 billion, around 50's there are 50 billion -There are 10x more glia than neurons -Neurons are primarily amitotic (don't divide); since most higher brain function based on plasticity which is stored in physical changes in neurons; neurons have specialized
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This note was uploaded on 03/28/2011 for the course BIO 01 taught by Professor Uzwiak during the Spring '11 term at Rutgers.

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17 - Nervous System -Well designed to process things on a...

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