33.高碳酸血症時,周邊化學受體(peripheral chemorecepto..-阿摩線上測驗
1F Rina 小一上 (2018/07/04)
For a given increase in PaCO2 or [H+], the carotid bodies are less responsive than the central chemoreceptors. The peripheral chemoreceptors account for only 20% to 30% of the ventilatory response to hypercapnia.5 However, they respond to increased arterial [H+] more rapidly than the central chemoreceptors. The explanation is that, in contrast to the central chemoreceptors, the carotid bodies are exposed directly to arterial blood. The body’s initial ventilatory response to metabolic acidosis is fairly quick, even though H+ crosses the blood-brain barrier with difficulty... 查看完整內容 |
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