BIOL273 Study Guide - Final Guide: Neuroglia, Schwann Cell, Dendritic Cell

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Introduction physiology: study of the structure and function of a living organism and its component parts. From one part of the body to another, very little ecm homeostasis: maintenance of a relatively stable internal environment; involves automatic control acclimatization: environmentally induced change in physiological function with no genetic change circadian rhythms: daily biological rhythms ex. Control and integration: local or long-distance control local: effects are exerted on neighbouring cells reflex: reaction is controlled from elsewhere steady state: a system in which a particular variable is not changing and energy is constantly added ex. Internal body temperature stimulus sensor/receptor afferent pathway integrating centre efferent pathway target/effector response. Negative feedback: opposes or removes the signal, returning the variable to its original state, oscillation around a set-point. Positive feedback: reinforces stimulus, further from the set-point (not homeostatic) ex. labour. Feedforward control: predicts that change is about to happen, starts the response loop before stimulus to prevent change and have less oscillation ex.

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