![]() There is a high amount of arterial PCO2 in the blood and the body is triggered to increase breathing rate. Central chemoreceptors in the body are activated in a negative feedback cycle when there are high levels of PCO2 due to increased altitude, further causing hyperventilation. ![]() Specific Pulmonary response: Hyperventilation- Increased TV-> TV and RR-( exercise)-> hyperventilation occurs decreasing CO2 and increasing O2 Hypoxia-induced increase in minute ventilation When a person (at rest) changes from sea level to high altitude, the specific pulmonary response is to cause hyperventilation. The pulmonary response is to increase ventilation rate/ volume to increase gas exchange and O2 availability. ![]() Higher altitude= lower PaO2 Lower PaO2 decreases the oxygen available to tissues causing hypoxia. ![]()
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