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Lecture notes 20- - Lecture Notes Bio 109 Fall 2010 Dr Catherine Loudon/12/10 Oxygen-hemoglobin dissociation curves regulation of respiration 1

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Lecture Notes Bio 109, Fall 2010, Dr. Catherine Loudon Lecture 20 – 11/12/10 – Oxygen-hemoglobin dissociation curves, regulation of respiration 1) Announcements a) Might find “Interactive Physiology” CD helpful for studying partial pressure and oxygen- hemoglobin dissociation curves (Respiratory System/Gas Exchange and Respiratory System/Gas Transport sections) 2) Your question – What if two gases are present – do they affect each other? No (e.g. Fig. 18- 2, walked through example) 3) Partial pressures of oxygen and carbon dioxide in the alveoli are different from the atmosphere (compare Table 17-2 with Fig. 18-3) 4) Importance of reversibility of oxygen binding to hemoglobin (Fig. 18-6) 5) Oxygen must diffuse into red blood cells to bind to hemoglobin (Fig. 18-5, 18-6) a) A small percentage of the oxygen carried in the blood is dissolved in the plasma (~2%); most is bound to hemoglobin (Fig. 18-7) 6) Oxygen-hemoglobin dissociation curves (Fig. 18-9) a) Effects of high altitude (total pressure is lower, so partial pressure of oxygen is lower)
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This note was uploaded on 12/01/2010 for the course BIO SCI Bio Sci E1 taught by Professor Catherineloudin during the Spring '10 term at UC Irvine.

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Lecture notes 20- - Lecture Notes Bio 109 Fall 2010 Dr Catherine Loudon/12/10 Oxygen-hemoglobin dissociation curves regulation of respiration 1

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