胰腺不会在消化鱼中对心率的非上腺和非胆固醇刺激做出贡献
Igor Noll Guagnoni1, Katja Bundgaard Last2, Emil Rindom2
1Section for Zoophysiology, Department of Biology, Aarhus University, Aarhus, Denmark; Department of Biological Sciences, São Paulo State University (UNESP), Rua Cristóvão Colombo, 2265, São José do Rio Preto, SP 15054-000, Brazil.
概括
胰腺切除术没有改变消化的内在心率,这表明胰腺激素如葡萄糖和胰岛素不能调节这些爬行动物的食后心率.
科学领域:
- 比较生理学比较生理学
- 调节心血管系统的调节
- 类学 类学 类学 类学
背景情况:
- 脊椎动物在消化过程中由于新陈代谢的增加而增加心率.
- 非上腺非胆固醇刺激 (NANC) 有助于这种心动减速,可能是通过循环激素.
- 爬行动物表现出与消化有关的明显的NANC刺激.
研究的目的:
- 为了调查胰腺荷尔蒙是否会影响缅甸的消化过程中的心率.
- 确定胰腺在食后心率调节中的作用.
- 为了评估胰腺因子对心脏的慢性作用.
主要方法:
- 胰腺切除术是在缅甸身上进行的.
- 在自主阻塞 (氨酸和氨酸) 之前和之后监测心率.
- 分析了氧气消耗和心率变化.
主要成果:
- 正如预期的那样,消化诱导的心动减速.
- 胰腺切除术在自主阻塞后不会影响内在心率.
- 没有发现像葡萄糖和胰岛素这样的激素在的消化过程中调节心率.
结论:
- 胰腺激素似乎不是缅甸白的食后心率的主要调节者.
- 在这种物种中,在消化过程中NANC刺激心率并非由胰腺分泌物介导.
- 需要进一步的研究来确定涉及的特定NANC因素.
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