Which term describes the release of oxygen from oxyhaemoglobin to tissues?

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Study the AQA A Level PE Test for The Cardiovascular System. Prepare with flashcards and multiple choice questions, each with explanations. Get ready for exam success!

Multiple Choice

Which term describes the release of oxygen from oxyhaemoglobin to tissues?

Explanation:
The release of oxygen from oxyhaemoglobin to tissues is described by oxyhaemoglobin dissociation. In the lungs, haemoglobin picks up O2 to form oxyhaemoglobin. In tissues, where oxygen pressure is lower and conditions such as higher CO2, lower pH and higher temperature prevail, haemoglobin’s affinity for oxygen decreases and the O2 is released to the tissues. The Bohr shift explains how these factors influence the affinity and thus the amount released, but the actual process name remains oxyhaemoglobin dissociation.

The release of oxygen from oxyhaemoglobin to tissues is described by oxyhaemoglobin dissociation. In the lungs, haemoglobin picks up O2 to form oxyhaemoglobin. In tissues, where oxygen pressure is lower and conditions such as higher CO2, lower pH and higher temperature prevail, haemoglobin’s affinity for oxygen decreases and the O2 is released to the tissues. The Bohr shift explains how these factors influence the affinity and thus the amount released, but the actual process name remains oxyhaemoglobin dissociation.

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