BIOL 1050 Lecture Notes - Lecture 1: Central Nervous System, Somatic Nervous System, Peripheral Nervous System

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Module 4 animal physiology (introduction and nervous system) Tested primarily on lecture notes: reinforced by textbook. Controlling and communicating system of body: thoughts, actions, emotions reflect its activity, all body systems (voluntary/involuntary) controlled by it. Hormones released by nervous system, travels through blood. Input: millions of sensory receptors that monitor changes (or stimuli) inside and outside body. Integration: processes and interprets sensory input and decides what to do at each moment. Output: effects/causes response by activating muscles/glands (effectors) via motor output. Structural: central nervous system (cns), peripheral nervous system (pns) Sympathetic ns (fight or flight; blood glucose increases ready to go) Parasympathetic ns (relaxed, digestion working well; blood glucose decreases) Types of cells (good for mult choice ques!) Astrocytes (look like little stars; brain and spinal cord; accounts for nearly half of supporting cells in cns) Microglia (spider-like cells digest bacteria, materials) Oligodendrocytes (myelin sheaths (fatty mask) in the cns: pns glia:

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