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

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

• A. Haemoglobin
• B. Bohr shift
• C. Vascular Shunt Mechanism
• D. Oxyhaemoglobin Dissociation

Answer: (D)

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.