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Fluid%20Electrolyte%20Balance%20Slides

Fluid%20Electrolyte%20Balance%20Slides - IPHY 3480 •...

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Human Physiology 2 – IPHY3480 Fluid and Electrolyte Balance
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Key variables under homeostatic control Na + and water: ECF volume and osmolarity K + : cardiac and muscle function Ca 2+ : exocytosis, muscle contractions, and other functions (bone formation, blood clotting) H + and HCO 3 : pH balance IPHY 3480
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Water Balance IPHY 3480
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IPHY 3480
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IPHY 3480
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IPHY 3480
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IPHY 3480 ADH – antidiuretic hormone Stimulate thirst Vasopressin controls water reabsorption by the kidney
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IPHY 3480 Aldosterone controls blood pressure
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IPHY 3480
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IPHY 3480 Aldosterone controls blood pressure
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IPHY 3480
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IPHY 3480
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Unformatted text preview: IPHY 3480 • Buffers • Moderate changes in pH • Combines with or releases H + • Cellular proteins, phosphate ions, and hemoglobin • Ventilation (CO 2 + H 2 O H 2 CO 3 H + + HCO 3-) • Rapid response • 75% of disturbances • Renal regulation • Slowest of the three mechanisms • Directly excreting or reabsorbing H + • Indirectly by change in the rate at which HCO 3 – Maintenance of pH homeostasis Key concepts • Na + (aldosterone) and water (vassopressin): ECF volume and osmolarity • H + and HCO 3 – : pH balance IPHY 3480...
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Fluid%20Electrolyte%20Balance%20Slides - IPHY 3480 •...

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