Given: Under normal circumstances the partial pressure of oxygen in air is approximately 160 mmHg. Let’s assume in the alveoli it drops to 100 mmHg when a person breaths 12x per minute. At the end of a 1-mile sprint a person is breathing 60x per minute, but, due to the decrease in the amount of time each breath spends in the lungs, the oxygen partial pressure is only drops to 140 mmHg before exhalation. a. How much has the amount of oxygen diffused through the alveoli increased or decreased? (Answer part a )

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