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Question
Body tissues obtain oxygen from haemoglobin because of its dissociation in tissues caused by:
Body tissues obtain oxygen from haemoglobin because of its dissociation in tissues caused by:
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Solution
The correct option is A Low oxygen concentration and high carbon dioxide concentration in the tissues
When oxygenated blood reaches the different tissues, the partial pressure of oxygen is higher (95 mm of Hg) than that of the tissues (40 mm of Hg) and the partial pressure of carbon dioxide is lesser in the blood (40 mm of Hg) than that of tissues (45 mm of Hg). Thus, the tissues have low oxygen concentration and high carbon dioxide concentration. The oxygen diffuses from the capillary blood to the body cells through tissue fluid and carbon dioxide diffuses from the body cells to the capillary blood via tissue fluid. This makes the blood deoxygenated, which is carried to the heart and then to the lungs.
When oxygenated blood reaches the different tissues, the partial pressure of oxygen is higher (95 mm of Hg) than that of the tissues (40 mm of Hg) and the partial pressure of carbon dioxide is lesser in the blood (40 mm of Hg) than that of tissues (45 mm of Hg). Thus, the tissues have low oxygen concentration and high carbon dioxide concentration. The oxygen diffuses from the capillary blood to the body cells through tissue fluid and carbon dioxide diffuses from the body cells to the capillary blood via tissue fluid. This makes the blood deoxygenated, which is carried to the heart and then to the lungs.
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