BIOL 1050 Lecture Notes - Lecture 23: Central Nervous System, Somatic Nervous System, Peripheral Nervous System

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29 Nov 2016
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Master of controlling and communicating system of the body. Every thought, action, and emotion reflects its activity. All body system whether voluntary or involuntary are controlled by it. Mainly uses rapid, very specific electrical impulses which causes immediate responses. Input: through millions of sensory receptors that monitor the changes (or stimuli) inside and outside the body. Integration: processes and interprets the sensory input and decides what to do at each moment. Output: effects or causes a response by activating muscles or glands (effectors) via motor output. Structural classification: central nervous system (cns) and peripheral nervous system (pns) Motor/efferent: somatic nervous system (voluntary, autonomic nervous system (involuntary) Sympathetic nervous system prepares body for fight/flight. Parasympathetic nervous system calms body down. Contain a cell body: metabolic center w/a nucleus surrounded by cytoplasm. Cell body: collections of cell bodies are called ganglia. Axon terminal: each one is separated from the next neuron by a gap = synaptic cleft; functional junction is the synapse.

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