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Define acid-base balance - correct answer✔ ✔
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Normal Function of body cells depend on regulation of acid-
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base balance
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Delicate balance (homeostasis) between acids and bases
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The Regulation of ___ is the key component of acid-
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base balance - correct answer✔ ✔ H+
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-
The pH of a fluid reflects the Hydrogen ion concentration of t
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hat fluid
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normal pH of arterial blood - correct answer✔ ✔ 7.35 -
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7.45
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There is a(n) ______ relationship between pH and H+ ion con
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centration - correct answer✔ ✔ inverse
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,-
The higher the H+ ion concentration, the lower the pH, and vi
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sa versa
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acidosis - correct answer✔ ✔ pH below 7.35
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Excess acids sd
Base (bicarbonate) deficit
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alkalosis - correct answer✔ ✔ pH above 7.45
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Excess bases (bicarbonate)
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Acid deficitsd
incompatible pH w life - correct answer✔ ✔
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<6.8 and > 7.8 sd sd sd
Three physiological mechanisms regulate balance by maintaini
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ng pH: - correct answer✔ ✔ 1. Chemical buffers
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2. Respiratory System
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-CO2
,3. Kidneys
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-HCO3
chemical buffer systems -
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what do they do & 3 principle buffers - correct answer✔ ✔
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Do not eliminate acids or bases from the body -
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they minimize pH changes
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React to minimize pH changes
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Capacity of the buffer is limited
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Hemostasis relies on the lungs and kidneys for true acid base
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compensation
Three Principle Buffers:
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1. Bicarbonate Buffer System
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2. Transcellular Hydrogen-Potassium Exchange System
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3. Protein Buffer System
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, Chemical Buffer System: sd sd
Transcellular Hydrogen/Potassium Exchange - correct answer
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✔ ✔ -Both H+ and K+ are positively charged sd sd sd sd sd sd
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Both H+ and K+ move freely between the ICF and ECF comp
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artments
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When excess H+ is present in the intravascular space, it move
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s into the ICF in exchange for K+
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-
When excess K+ is present in the intravascular space, it move
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s into the ICF in exchange for H+
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respiratory system as buffer - correct answer✔ ✔
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Lungs are the major organs of acid elimination
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Lungs excrete carbonic acid in it's gaseous form (CO2)
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As CO2 rises, acids ____and pH ____.
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