Tenney S M
Respir Physiol. 1985 Apr;60(1):121-34. doi: 10.1016/0034-5687(85)90044-1.
Larvae of the moth, Carpocapsa saltitans, demonstrate a diurnal activity pattern of rhythmic twitching which, under conditions of controlled light and temperature, is characterized by a predictable frequency and regularity. The twitching activity is shown to be sensitive to the partial pressure of environmental oxygen, and it ceases altogether at a particular PO2 called 'critical'. Use is made of the 'critical' PO2 in normobaric and hypobaric conditions to deduce the roles of diffusion and convection in the larval oxygen transport mechanisms; and also as a value for the total decrement of PO2 from ambient air to mitochondria, in order to evaluate predicted values based on calculations of resistance to oxygen flow. For this latter study 'porosity' of the larva and the seed pod in which it is normally housed was inferred from measured rates of water vapor loss, and oxygen uptake rates of the larvae were measured by the manometric technique of Warburg. Applying these data to a model system the conclusion was reached that almost the total resistance to oxygen flow is at the spiracle.
盐跃麦蛾的幼虫表现出一种有节奏抽搐的昼夜活动模式，在光照和温度可控的条件下，其特点是频率和规律性可预测。已表明抽搐活动对环境氧气的分压敏感，并且在称为“临界”的特定氧分压下完全停止。在常压和低压条件下利用“临界”氧分压来推断扩散和对流在幼虫氧气运输机制中的作用；并且还将其作为从环境空气到线粒体的氧分压总下降值，以便根据对氧气流动阻力的计算来评估预测值。对于后一项研究，从测得的水蒸气损失率推断幼虫及其通常所在的种子荚的“孔隙率”，并且通过瓦氏测压技术测量幼虫的氧气摄取率。将这些数据应用于一个模型系统，得出的结论是，几乎所有的氧气流动阻力都在气门处。
