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NREMT Paramedic

Category - Airway

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When oxygen enters the blood stream, what does it bind to?

T-cells
Blood cells
Hemoglobin
Carbon dioxide

Explanation

Answer: C - When oxygen enters the blood stream, it binds to hemoglobin. Oxygen is diffused across the alveolar-capillary membrane into the red blood cells where it binds with hemoglobin. It is then delivered to the cells. Carbon dioxide is picked up from the cells and delivered back across the alveolar-capillary membrane where it is exhaled.

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