17
Question
The given graph shows an oxygen dissociation curve for haemoglobin.
Where in the body will haemoglobin be saturated at the percentages shown at points 1,2 and 3 on the graph?
The given graph shows an oxygen dissociation curve for haemoglobin.
Where in the body will haemoglobin be saturated at the percentages shown at points 1,2 and 3 on the graph?
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Solution
The correct option is C Left ventricle2Pulmonary vein3Vena cava1
The relationship between the partial pressure of O2 (PO2) and percentage saturation of the Hb with O2 is graphically illustrated by a curve called oxygen dissociation curve. The haemoglobin is most saturated with oxygen in the pulmonary vein, as this vein is carrying oxygenated blood from the Iungs towards the left auricle of the heart. From the left auricle the blood moves to the left ventricle where saturation of Hb with O2 slightly reduces. Vena cava carries deoxygenated blood from all the organs of the body towards right auricle, thus, Hb is less saturated with O2.
The relationship between the partial pressure of O2 (PO2) and percentage saturation of the Hb with O2 is graphically illustrated by a curve called oxygen dissociation curve. The haemoglobin is most saturated with oxygen in the pulmonary vein, as this vein is carrying oxygenated blood from the Iungs towards the left auricle of the heart. From the left auricle the blood moves to the left ventricle where saturation of Hb with O2 slightly reduces. Vena cava carries deoxygenated blood from all the organs of the body towards right auricle, thus, Hb is less saturated with O2.
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