ANIMAL PHYSIOLOGY
GAS EXCHANGE IN HUMANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ion bikarbonatbicarbonate ion
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carbaminohaemoglobincarbaminohaemoglobin
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acid karbonik carbonic acid
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oxyhaemoglobinoxyhaemoglobin
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Detailed explanation-1: -There are three means by which carbon dioxide is transported in the bloodstream from peripheral tissues and back to the lungs: (1) dissolved gas, (2) bicarbonate, and (3) carbaminohemoglobin bound to hemoglobin (and other proteins).
Detailed explanation-2: -Hemoglobin carries 20-25% of carbon dioxide as carbamino-hemoglobin. 70% of the carbon dioxide is transported in the form of bicarbonate ions and the rest 7% is in the dissolved state through plasma. The binding of carbon dioxide or oxygen with hemoglobin is due to their partial pressure.
Detailed explanation-3: -Oxygen is carried both physically dissolved in the blood and chemically combined to hemoglobin. Carbon dioxide is carried physically dissolved in the blood, chemically combined to blood proteins as carbamino compounds, and as bicarbonate.
Detailed explanation-4: -Answer and Explanation: Carbon Dioxide is not d) bound to the polypeptide chains of hemoglobin.