NREMT Advanced EMT Practice Test #3

Answer - B - The Fick principle refers to oxygen. The movement and utilization of oxygen in the body depends on the following conditions: an adequate concentration of inspired oxygen, appropriate movement of oxygen across the alveolar-capillary membrane into the bloodstream, and adequate number of red blood cells to carry the oxygen, proper tissue perfusion, and efficient off-loading of oxygen at the tissue level. These conditions are collectively known as the Fick principle.