Which term describes hemoglobin that is not fully saturated with oxygen?

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Multiple Choice

Which term describes hemoglobin that is not fully saturated with oxygen?

Explanation:
Understanding how hemoglobin carries oxygen helps explain this. In the lungs, hemoglobin binds oxygen to form oxyhemoglobin, which is fully saturated with oxygen. When it releases that oxygen to tissues, it becomes deoxyhemoglobin, the form not fully saturated with oxygen. The other terms don’t describe oxygen saturation: oxyhemoglobin is the fully oxygenated form, polycythemia is an increased red blood cell mass, and ferritin is an iron storage protein.

Understanding how hemoglobin carries oxygen helps explain this. In the lungs, hemoglobin binds oxygen to form oxyhemoglobin, which is fully saturated with oxygen. When it releases that oxygen to tissues, it becomes deoxyhemoglobin, the form not fully saturated with oxygen. The other terms don’t describe oxygen saturation: oxyhemoglobin is the fully oxygenated form, polycythemia is an increased red blood cell mass, and ferritin is an iron storage protein.

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