Lecture03_bio201_f07[1]

Lecture03_bio201_f07[1] - Human Human Anatomy Anatomy &...

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Unformatted text preview: Human Human Anatomy Anatomy & Physiology & Physiology SEVENTH EDITION SEVENTH EDITION Elaine N. Marieb Elaine N. Marieb Katja Hoehn Katja Hoehn ARIZONA STATE UNIVERSITY ARIZONA STATE UNIVERSITY chool of Letters & Sciences chool of Letters & Sciences Lecture Series 3 Lecture Series 3 Bio 201 ASU DPC J. Acid-Base Concentration (pH) Acidic: pH 06.99 Basic: pH 7.0114 Neutral: pH 7.00 Bio 201 ASU DPC J. pH Measurement of Acidity Chemicals affect [H + ] and [OH- ] balance (acids & bases) [H + ] X [OH- ] always equals 10-14 The [H + ] is how we measure pH 0.1 M Acetic acid in water [H + ] = 10-2.88-2.88 +-7.4 Bio 201 ASU DPC J. pH Buffers Systems that resist abrupt and large swings in the pH of body fluids These buffers can absorb added acids or bases Carbonic acid-bicarbonate system Carbonic acid dissociates, reversibly releasing bicarbonate ions and protons The chemical equilibrium between carbonic acid and bicarbonate resists pH changes in the blood Bio 201 ASU DPC J. Organic Compounds Molecules unique to living systems contain carbon and hence are organic compounds They include: Carbohydrates Lipids Proteins Nucleic Acids Bio 201 ASU DPC J. Carbohydrates Contain carbon, hydrogen, and oxygen Their major function is to supply a source of cellular food Examples: Monosaccharides or simple sugars Bio 201 ASU DPC J. Dehydration & Hydrolosis Poly-saccharides are cleaved by adding a molecule of water: Hydro-lysis Poly-saccharides are polymerized by removing a molecule of water: Dehydration synthesis (condensation) Bio 201 ASU DPC J. Carbohydrates Disaccharides or double sugars Bio 201 ASU DPC J. What is Lactose Intolerance? Why are some people lactose intolerant?...
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This note was uploaded on 04/29/2008 for the course BIO 201 taught by Professor Oberstein during the Fall '08 term at ASU.

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Lecture03_bio201_f07[1] - Human Human Anatomy Anatomy &...

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