Instructions

Patient W has experienced a sudden loss in endurance over the past several months. His cardiac output is strong, but his heart rate is much higher than normal. His alveolar Poz is about 150 mmHg, higher than normal, and he is breathing hard all of the time. His alveolar Pcoz is 20 mm Hg. lower than normal. His arterial Poz is lower than normal, as is his arterial percent hemoglobin saturation (which is below 70%). At what step in the transport of gases between atmosphere and tissues is a problem occurring? Explain your answer. 5 pts Explain a disease process that could cause this problem. 5 pts Patient G has also lost endurance. She has a high ventilation and high heart rate at rest. Her exhaled, alveolar Poz and arterial Po2 and Pcoz values are all normal, as is her hemoglobin percent saturation. Venous Poz is very low. At what step in the transport of gases between atmosphere and tissues is a problem occurring? Explain your answer. 5 pts Explain a disease process could cause this to occur. 5 pts

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