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首页> 外文期刊>Journal of Comparative Physiology, B. Biochemical, Systemic, and Environmental Physiology >The relationship between body temperature, heart rate, breathing rate, and rate of oxygen consumption, in the tegu lizard (Tupinambis merianae) at various levels of activity
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The relationship between body temperature, heart rate, breathing rate, and rate of oxygen consumption, in the tegu lizard (Tupinambis merianae) at various levels of activity

机译：各种活动水平下的特古蜥蜴（Tupinambis merianae）的体温，心率，呼吸率和耗氧率之间的关系

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摘要

The present study determined whether EEG and/or EMG recordings could be used to reliably define activity states in the Brazilian black and white tegu lizard (Tupinambis merianae) and then examined the interactive effects of temperature and activity states on strategies for matching O-2 supply and demand. In a first series of experiments, the rate of oxygen consumption (), breathing frequency (f (R)), heart rate (f (H)), and EEG and EMG (neck muscle) activity were measured in different sleep/wake states (sleeping, awake but quiet, alert, or moving). In general, metabolic and cardio-respiratory changes were better indictors of the transition from sleep to wake than were changes in the EEG and EMG. In a second series of experiments, the interactive effects of temperature (17, 27 and 37 A degrees C) and activity states on f (R), tidal volume (V (T)), the fraction of oxygen extracted from the lung per breath (FIO2-FEO2), f (H), and the cardiac O-2 pulse were quantified to determine the relative roles of each of these variables in accommodating changes in . The increases in oxygen supply to meet temperature- and activity-induced increases in oxygen demand were produced almost exclusively by increases in f (H) and f (R). Regression analysis showed that the effects of temperature and activity state on the relationships between f (H), f (R) and was to extend a common relationship along a single curve, rather than separate relationships for each metabolic state. For these lizards, the predictive powers of f (R) and f (H) were maximized when the effects of changes in temperature, digestive state and activity were pooled. However, the best r (2) values obtained were 0.63 and 0.74 using f (R) and f (H) as predictors of met abolic rate, respectively.
机译：本研究确定了EEG和/或EMG记录是否可用于可靠地定义巴西黑白特古蜥蜴（Tupinambis merianae）的活动状态，然后研究了温度和活动状态对O-2供应匹配策略的交互作用和需求。在第一批实验中，在不同的睡眠/觉醒状态下测量了耗氧率（），呼吸频率（f（R）），心率（f（H））以及EEG和EMG（颈部肌肉）活动（睡觉，清醒但安静，机警或移动）。一般而言，代谢和心脏呼吸变化比EEG和EMG的变化更好地指示了从睡眠到唤醒的转变。在第二系列实验中，温度（17、27和37 A摄氏度）和活动状态对f（R），潮气量（V（T）），每次呼吸从肺中提取的氧气分数的交互作用（FIO2-FEO2），f（H）和心脏O-2脉冲被量化，以确定这些变量中每个变量在适应变化中的相对作用。满足温度和活动引起的氧气需求增加的氧气供应增加几乎完全是通过f（H）和f（R）的增加而产生的。回归分析表明，温度和活动状态对f（H），f（R）之间关系的影响是沿一条曲线扩展一个公共关系，而不是针对每种代谢状态分别建立关系。对于这些蜥蜴，当温度，消化状态和活性变化的影响合并在一起时，f（R）和f（H）的预测能力最大。但是，使用f（R）和f（H）分别作为满足的切除率的指标，获得的最佳r（2）值分别为0.63和0.74。

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