What acid is formed when CO 2 combines with water? Hydrochloric None of these is correct Sulfuric Nitric Hydrofluoric What is the degenerative loss of alveolar surface area? Asthma None of these is correct Emphysema Fibrotic lung Pulmonary edema In what situation would hypoxia occur, but not hypercapnia? Normal breathing at sea level Normal breathing at the top of Mt. Everest Rebreathing None of these is correct Holding your breath What factor determines whether O 2 will bind or dissociate from the Hb molecule? The partial pressure of O 2 in the surrounding fluid The partial pressure of CO 2 in the surrounding fluid None of these is correct The amount of Hb in the RBC The osmotic pressure of the surrounding fluid .