Practice Quiz

NREMT Advanced EMT Practice Test #1

Category - EMT-I/85

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When oxygen enters the blood stream, what does it bind to?
  1. T-cells
  2. Blood cells
  3. Hemoglobin
  4. 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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