Control System

Control System - The Human Organism * Definitions: *...

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The Human Organism * Definitions: * Anatomy = STRUCTURE of the body * Physiology = How the body FUNCTIONS * Major Organizing Principles: * STRUCTURE/FUNCTION Relationship Hierarchical Organization Structure is adapted to function * HOMEOSTASIS * Cell-to-cell COMMUNICATION Hierarchy of Organization 1. chemical 2. cellular 3. tissue 4. organ 5. organ system 6. organism Structure is adapted to function Homeostasis Definition HOMEOSTASIS: Dynamic steady state of conditions in the body – especially ECF NOT an equilibrium – rather a DYNAMIC STEADY STATE (“Dynamic constancy”) “Within Narrow Limits” – small fluctuations around the “Set Point” Body Fluid Compartments Intracellular fluid (67%) Extracellular fluid * Interstitial(empty space or gaps) fluid (26%) * Blood plasma (7%) Feedback Control Mechanisms Components of a Control System Physiological VARIABLE Set Point / Normal Range (set by controller) 1
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Sensor / Receptor (monitors variable)
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Control System - The Human Organism * Definitions: *...

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