Respuesta :
The hemoglobin of bar-headed geese has a higher affinity for [tex]O_{2}[/tex] (whole-blood P50 of 4.0 kPa at pH 7.4 and [tex]CO_{2}[/tex] tension of ∼5 kPa) than that of closely related lowland geese (5.3 kPa) in graylag goose under the same conditions.
What is difference between the bar-headed goose high altitude hemoglobin and the graylag goose hemoglobin ?
Compared to closely similar lowland geese (5.3 kPa in graylag goose under the same conditions), bar-headed geese hemoglobin has a stronger affinity for [tex]O_{2}[/tex] (whole-blood P50 of 4.0 kPa at pH 7.4 and [tex]CO_{2}[/tex] tension of 5 kPa), which increases pulmonary [tex]O_{2}[/tex] loading and peripheral [tex]O_{2}[/tex] delivery in hypoxia. Numerous adaptations enable bar-headed geese exercise in low oxygen environments.
For instance, compared to most other birds their size, they have larger lungs, and the hemoglobin in their red blood cells is altered so that it binds oxygen much more firmly. These geese have a daily migration range of more than 1609 kilometers (1,000 mi). The geese's annual migration, according to scientists, is brought on by an environmental signal that enables them to avoid the worst winter storms and the summer monsoon season.
Thus from above conclusion we can say that the difference between the bar-headed goose high altitude hemoglobin and the graylag goose hemoglobin is that the hemoglobin of bar-headed geese has a higher affinity for [tex]O_{2}[/tex] (whole-blood P50 of 4.0 kPa at pH 7.4 and [tex]CO_{2}[/tex] tension of ∼5 kPa) than that of closely related lowland geese (5.3 kPa) in graylag goose under the same conditions.
Learn more about the Hemoglobin here:
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