PHGY 209 Lecture Notes - Nmda Receptor, Acetylcholinesterase, Grey Matter
6 Apr 2012
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Document Summary
The key idea of the nervous system is that it contains a central processing unit which allows the body to keep memory of the past. Biologically speaking, you are not the same person you were 5 years ago, all your cells have turned over and you are now composed of completely new materials. However, the brain is an incredibly complex central processing unit which allows to keep memory of the past. The central nervous system is made up of various components which transfer information from one to another by chemical differences: The peripheral nervous system contains afferent fibers which transfer information to the brain from sensory nerves, and efferent fibers which carry signals from the brain to motor neurons, as well as autonomic fibers. These categories are very unified; every part of the body belongs to the nervous system. The system functions as a whole, and each cell exists as part of a larger system.
