Approximately what percentage of oxygen is bound to hemoglobin in arterial blood?

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Multiple Choice

Approximately what percentage of oxygen is bound to hemoglobin in arterial blood?

Oxygen transport is measured by how much is bound to hemoglobin versus dissolved in plasma. In arterial blood, hemoglobin is highly saturated but not perfectly; under normal conditions about 97% of the available hemoglobin binding sites are occupied by O2. The remaining ~3% of O2 is dissolved directly in the plasma. So the best approximation for oxygen bound to hemoglobin in arterial blood is 97%.

Oxygen transport is measured by how much is bound to hemoglobin versus dissolved in plasma. In arterial blood, hemoglobin is highly saturated but not perfectly; under normal conditions about 97% of the available hemoglobin binding sites are occupied by O2. The remaining ~3% of O2 is dissolved directly in the plasma. So the best approximation for oxygen bound to hemoglobin in arterial blood is 97%.

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