Oxyhaemoglobin dissociation curve is a ____ curve that shows the percentage of ____ saturated with oxygen at different partial pressure of ____ (in lungs, tissue at rest and tissue during exercise). If the partial pressure of oxygen is high,100 mm Hg , which is in ____, about 98% of haemoglobin are saturated with oxygen. If the partial pressure of oxygen decreases to 40 mm Hg, which is in tissues at ____, about 70% of haemoglobin are saturated with ____. About ____ (98% - 70%)of oxygen unloaded from haemoglobin into tissue at rest. This is because, when partial pressure of oxygen is low, affinity of haemoglobin towards oxygen ____. Causing ____ dissociate into oxygen and haemoglobin, and oxygen released will ____ into the tissue. At tissue during exercise, partial pressure of oxygen ____ even lower to 18 mm Hg leaving about 18% of haemoglobin are saturated with ____. About ____ (98% - 18%) of oxygen unloaded from ____ into the active tissue. This is because, active tissue consumed more oxygen and partial pressure of oxygen decrease even lower. At low partial pressure of oxygen, the ____ of haemoglobin towards oxygen decreases even lower. More ____ dissociate into oxygen and haemoglobin, so more oxygen ____ into the active tissue.

7.1 (c) Oxyhaemoglobin dissociation curve

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