BIO200H5 Lecture Notes - Lecture 16: Acetylcholine, Endocrine System, Cerebrospinal Fluid

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14 Feb 2017
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Network of specialized cells that communicate information about external/internal state. Active at all time, controls unconscious muscles, breathing pressure on skin, temperature, tight and odors. Has 2 divisions: central nervous system (cns) and peripheral nervous system (pns) Cns consists of brain and spinal cord; pns consists of nerves that carry information btw organs and cns. Pns is further divided into somatic nervous system (sns) and automatic nervous system (ans) Sns controls skeletal muscles, bones & skin (can serve sensory nerves, or motor nerves) Ans(controls internal organs) is divided into 2 parts: sympathetic ns controls fight or flight reaction, parasympathetic ns functions such as sleep and digestion. Anatomy of nerve cells (ns has 2 types of nerve cells: glial cells & neurons) Glial cells non-conducting cells, provide structural support and perform metabolic function for. Ns: ex: myelin sheath cells that surround nerve axons acts as insulation, ensuring efficient transmission of electric charge. Neurons (3types: sensory neurons: sense/relay info from env.

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