首页> 外文期刊>Polar biology >Warm-induced bradycardia and cold-induced tachycardia: mechanisms of cardiac and ventilatory control in a warm-acclimated Antarctic fish
【24h】

Warm-induced bradycardia and cold-induced tachycardia: mechanisms of cardiac and ventilatory control in a warm-acclimated Antarctic fish

机译:温暖引起的心动过缓和寒冷引起的心动过速:温驯南极鱼的心脏和通气控制机制

获取原文
获取原文并翻译 | 示例
           

摘要

While many Antarctic organisms possess only limited ability to respond to environmental temperature change, there is now substantial evidence to confirm that the notothenioid fish, Pagothenia borchgrevinki, has retained some thermal flexibility and can successfully acclimate to a 5℃ increase in temperature. Previous research demonstrated that after acclimation to 4℃, resting cardiac output in this species was thermally independent, while cold-adapted fish demonstrated thermal dependence of cardiac output. Here, we extend this research into cardiovascular plasticity and report the following: (1) The mechanisms responsible for the thermal independence of cardiac output in warm-acclimated (4℃, for 4 weeks) fish include a combination of warm-induced bradycardia and cold-induced tachycardia bouts. (2) These acute responses are under cho-linergic control. (3) Changes to the thermal sensitivity of heart rate and ventilation rate result in concomitant changes to cardio-respiratory coupling in warm-acclimated fish.
机译:尽管许多南极生物对环境温度变化的响应能力有限,但现在有大量证据证实,类胡萝卜素鱼Pagothenia borchgrevinki保留了一定的热柔韧性,可以成功适应5℃的温度升高。先前的研究表明,在适应4℃后,该物种的静息心输出量与热量无关,而冷适应鱼表现出心输出量的热依赖性。在这里,我们将这项研究扩展到心血管可塑性方面,并报告以下内容:(1)温热(4℃,持续4周)鱼的心输出量热独立性的机制包括温诱发的心动过缓和感冒的结合引起的心动过速发作。 (2)这些急性反应在胆碱能控制下。 (3)心率和通气率对热敏感度的变化导致温热鱼的心肺耦合随之变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号