The Nervous System: A basic Summary of the nervous system and some little peices on how it is affected by disease and drugs.
The Nervous system receives sensory input from the internal and external environment. It then integrates the input in the sensory centers of the brain and responds to the various stimuli with a motor output, which can be converted by the organs to some form of energy ie. movement, release of hormones, changes in heart rate. The response is not always conscious, for instance if you were climbing a mountain and the air became thinner, you would start breathing deeper and quicker. Was this response voluntary? Of course not, the nervous system assessed the situation and responde…
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