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Acid - weak bases physiological buffer systems o...

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Acid-Base Balance - maintaining pH of body fluids important for protein function - blood pH is normally maintained between pH 7.35-7.45 o alkalosis : blood pH > 7.45 o acidosis : blood pH < 7.35 - chemical buffer systems (chemical acid-base buffers) : o bicarbonate buffer system : mixture of carbonic acid & its salt sodium bicarbonate in the same solution; primary blood buffer carbonic acid reacts with added base to stabilize pH bicarbonate ion reacts with added acid to stabilize pH CO 2 + H 2 O H 2 CO 3 H + + HCO 3 - o phosphate buffer system : mixture of dihydrogen phosphate (weak acid) & monohydrogen phosphate (weak base) o protein buffer system : proteins in plasma & within cells can act as weak acids or
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Unformatted text preview: weak bases- physiological buffer systems: o respiratory system regulation of hydrogen ion concentration : Kevin Kelleher, MTC Biology 211 Study Notes Exam 4 4 carbon dioxide from metabolism enters blood & combines with water to form carbonic acid carbonic acid unstable & reversibly breaks down into hydrogen & bicarbonate ions o renal mechanisms of acid-base balance: conserving filtered bicarbonate ions: bicarbonate reabsorption during acidosis : bicarbonate ions generated while excreting hydrogen ions during alkalosis : bicarbonate ion secretion while reabsorbing hydrogen ions Page4...
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