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Chap1 - Chapter 1-Homeostasis I The Scope of Human...

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1 Chapter 1-Homeostasis I. The Scope of Human Physiology A. Physiology: B. Pathophysiology II. How the body is Organized A. Cells: 1. Common fundamental activities: 2. Differentiation: a. Muscle: b. Epithelial: c. Nerve: d. Connective: B. Tissue: -Extracellular Matrix: C. Organ: D. System (Organ system): E. Internal Environment:
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2 F. Thus fundamental activities of individual cell -Specialized Activities IV. Body Fluid Compartments A. Two fluid compartments: Serve different functions 1. Intracellular: 2. Extracellular (Internal environment) a. Interstitial: b. Plasma: B. 60% body weight is water C. Compartmentalization: Separated by membranes. V. Homeostatis A. Homeostasis: 1. Example: Regulation of body temperature 2. Variability and Time-averaged Means 3. How is homeostasis quantified? VI. General Characteristics of Homeostatic Control Systems A. Homeostatic Control System B. Steady State C. Equilibrium D. Set Point
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3 E. Feedback 1. Negative-feedback: 2. Positive-feedback: Why Important? F. Resetting of Set Points G. Feedforward Regulation: Anticipates changes in regulated variables
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