respirationdiscussion2-1

respirationdiscussion2-1 - Respiratory Discussion 4) a)...

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Respiratory Discussion 4) a) Describe how oxygen and carbon dioxide are transported in the blood. 98% of the total O 2 content of blood is reversibly bound to hemoglobin inside the red blood cells. Hemoglobin is a globular protein consisting of four subunits. Each subunit can bind one molecule of O 2 , for a total of four molecules of O 2 per molecule of hemoglobin. When hemoglobin is oxygenated, it is called oxyhemoglobin; when it is deoxygenated, it is called deoxyhemoglobin. CO 2 is carried in the blood in three forms: as dissolved CO 2 , as carbaminohemoglobin (CO 2 bound to hemoglobin), and as bicarbonate (HCO 3 - ). HCO 3 - is quantitatively the most important of these forms. Almost all of the CO 2 carried in blood is in a chemically modified form, HCO 3 - , which accounts for more than 90% of the total CO 2 . b) What is the relationship between hemoglobin saturation and dissolved O 2 ? O
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respirationdiscussion2-1 - Respiratory Discussion 4) a)...

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