简短的沟通:胚胎驼 (Dromiceius novaehollandiae) 的巴罗反射功能
Dane A Crossley1, Brian P Bagatto2, Ed M Dzialowski1
1Developmental Integrative Biology, Department of Biological Sciences, University of North Texas, 1155 Union Circle #305220, Denton, TX 76203-5017, USA.
概括
气体反射,心血管控制机制,在驼胚胎中晚期成熟,与鱼不同. 这表明,在大多数胚胎发育过程中,巴罗反射功能可能对鸟类心血管平衡不至关重要.
科学领域:
- 心血管生理学心血管生理学
- 发育生物学是发展生物学.
- 比较生理学比较生理学
背景情况:
- 巴罗反射是一种重要的负反循环,通过心脏和外周调整调节动脉血压.
- 对于发育中的脊椎动物,特别是产卵物种,巴罗反射的成熟和功能的理解是有限的.
- 在鸟类和爬行动物胚胎中现有的知识显示,巴罗反射功能的时间有所不同.
研究的目的:
- 研究胚胎驼 (Dromiceius novaehollandiae) 中巴罗反射的成熟和功能时间.
- 为了比较以和和鱼的巴罗反射发育.
- 为了测试这个假设,以,拥有早期的阴道音调,会展现一个早期的功能性巴罗反射类似于鱼.
主要方法:
- 在不同发育阶段研究了胚胎驼的巴罗反射功能.
- 监测心血管参数以评估反射反应.
- 结果与和鱼胚胎的现有数据进行了比较.
主要成果:
- 在90%的潜伏期,Emu胚胎表现出功能性低血压巴罗反射.
- 这个时间表与家胚胎相似,而不是早期成熟的鱼胚胎.
- 这些发现不支持关于驼早期巴罗反射成熟的初始假设.
结论:
- 驼胚胎的巴罗反射在发育晚期 (90%的潜伏期) 开始发挥作用.
- 这种模式与早期在鱼胚胎中观察到的功能性巴罗反射形成鲜明对比.
- 在大多数鸟类胚胎发育过程中,巴罗反射功能可能对心血管稳定不至关重要.
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