Control of panting in the desert iguana: roles for peripheral temperatures and the effect of dehydration.
Control of panting in the desert iguana: roles for peripheral temperatures and the effect of dehydration.
复制标题
沙漠鬣蜥喘气的控制：外围温度的作用和脱水的影响。
DOI：
10.1002/jez.1402350305
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
CrawfordJr,EC
中科院分区：
文献类型：
--
作者：
Dupre,RK;CrawfordJr,EC
虽然人们普遍认为，喘息是热应激期间调节大脑温度的一种生理机制，但一些研究指出，外周输入对于启动各种动物的喘息反应非常重要。通过呈现47°、54°、58°和65°C的环境热负荷，并测量沙漠鬣蜥呼吸开始时的皮肤、耳朵和核心温度，我们发现呼吸开始时的皮肤温度与环境热负荷无关。这表明，皮肤(外周)温度是中央体温调节中心提示启动热喘息的体温。当沙漠鬣蜥的血浆渗透压升高100mOsm/kg H2O模拟脱水时，仍能保持对喘息的周围温度控制。脱水至80%初始体重(IBW)导致喘息阈值(皮肤)从未经处理的蜥蜴的42℃逐渐增加到90%IBW时的42.5℃到80%IBW时的43.3℃。注射体积相当于体重10 mM氯化钠的80%IBW蜥蜴的喘气阈值降低到40.8°C，注射1%体重的3000 mM氯化钠使蜥蜴的喘气阈值显著增加到45.9℃。这些数据表明，沙漠鬣蜥对脱水的反应是通过提高喘气阈值来实现的，从而促进了水源保护。这些数据还表明，血浆渗透压的变化可能与喘息阈值的“设定”有关。
Although it is generally held that panting is a physiological mechanism for the regulation of brain temperature during heat stress, a number of studies have pointed to the importance of peripheral input for the initiation of the panting response in a variety of animals. By presenting ambient heat loads of 47°, 54°, 58°, and 65°C, and measuring skin, ear and core temperatures of the desert iguana,Dipsosaurus dorsalis, at the onset of panting, we found that the skin temperature at panting onset was independent of ambient heat load. This suggests that skin (peripheral) temperature is the body temperature on which the central thermoregulatory center cues to initiate thermal panting. Peripheral temperature control of panting was retained when the plasma osmolality of the desert iguana was increased by 100 mOsm/kg H2O to simulate dehydration. Dehydration to 80% initial body weight (IBW) resulted in a progressive increase in panting threshold (skin) from 42°C for untreated lizards to 42.5°C at 90% IBW to 43.3°C at 80% IBW. Injection of 80% IBW lizards with a volume of 10 mM NaCl equivalent to weight loss resulted in a decrease in panting threshold to 40.8°C. Injection with 1% body weight 3000 mM NaCl produced a dramatic increase in panting threshold to 45.9°C. These data suggest that the desert iguana responds to dehydration by elevating panting threshold, thus promoting water conservation. These data also suggest that changes in plasma osmolality may be involved in the “setting” of panting threshold.
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影响因子：
--
作者：
S. Richards
通讯作者：
S. Richards
核心、皮肤和大脑温度对蜥蜴 Sauromalus obesus 喘气的影响。
影响因子：
--
作者：
E. C. Crawford;B. Barker
通讯作者：
B. Barker
脱水对暴露在高温环境下的猫的体温调节的影响。
DOI：
--
发表时间：
1981
期刊：
Journal of applied physiology: respiratory, environmental and exercise physiology
影响因子：
--
作者：
P. Doris;M. A. Baker
通讯作者：
M. A. Baker
DOI：
10.1086/physzool.40.1.30152438
发表时间：
1967-01
期刊：
Physiological Zoology
影响因子：
--
作者：
C. DeWitt
通讯作者：
C. DeWitt
蜥蜴 Dipsosaurus dorsalis 周围温度的双阈值控制
DOI：
--
发表时间：
1979
期刊：
Physiological Zoology
影响因子：
--
作者：
B. J. Barber;E. C. Crawford
通讯作者：
E. C. Crawford