Part F - Module 21.7 Neural Control of Ventilation The members of the CBRT devel

Question

Part F - Module 21.7 Neural Control of Ventilation The members of the CBRT develop asthma-like symptoms from irritation of the airways. Others would bee However, some of the lasting effects from phosgene exposure might not come from anticipated that vidtims might need fol llow-up care after release from the hospital. Many victims exposed to phosgene are likely to pected to report dyspnea on exertion for a year or more fo the gas itself, but rather from the treatment. High PEEP greatly enhanoes pulmonary edema, but it is not without complications One of the most frequent complications of PEEP is barotrauma-damage to the airways of the respiratory zone from high pressures If the degree of barotrauma is significant, the alveoli may be damaged, leading to emphysema. However even with these possible complications, most patients without underlying disesses will fully recover from phosgene inhalation, as long as the situation is recognized and treated aggressively from the start. The CBRT team condluded that the exeroise showed that their recommendations could be used to write protocols for managing a disaster involving exposure to lung-damaging agents We know that some of the victims were in severe respiratory distress. A sample of these patients' arterial blood provided the following dlinical lab results PO2 and pH are both below normal; and Pcoz and the bicarbonate ion level are both above normal. Which of these clinical lab results is the most powerfu stimulus for inducing changes in pulmonary ventilation? O PCO2 Submit My Answers Ghee Up Continue

Explanation / Answer

The CO2 concentration affects fast in pulmonary ventilation. A slight increase in PCO2 level (normal- 35 to 45 torr) causes increase in hydrogen ions and decrease in pH. The CO2 dissolve readily in blood. It causes rapid breathing. Low CO2 concentration in blood causes slow breathing.

Therefore, the correct option is 2nd option (PCO2).

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