Explore a comprehensive medical lecture on the types of hypoxia, focusing on respiratory issues, hypoxemia, and hypoxemic conditions. Delve into the definition of hypoxia, normal oxygen supply to tissues, and various causes. Examine the classification of hypoxia types and understand normal values of PAO2, PaO2, and PCO2. Investigate hypoxic hypoxia in different scenarios, including low oxygen inspiration, asthma, and respiratory pump failure. Learn about the importance of careful oxygen administration in COPD patients and the mechanics of shunting in hypoxic hypoxia. Discover anemic, stagnant, and histotoxic hypoxia, along with their responses to supplemental oxygen. Analyze the mechanism of hypoxia related to gas exchange membrane problems and the corresponding oxygen therapy response.