机开放,机关闭和运动肌肉的动力比较
Clinton J Moran1, Shannon P Gerry2
1The Citadel, Biology Department, 171 Moultrie Street, Charleston, SC 29409, USA.
概括
骨肌的收缩速度在鱼类的游泳和食肌肉之间有所不同. 温度影响肌肉性能,但收缩动力学在不同的肌肉和温度中保持着惊人的一致性.
科学领域:
- * 进行比较的肌肉生理学
- * 脊椎动物的生物力学
- *环境对肌肉功能的影响
背景情况:
- * 骨肌收缩动态对于理解生物体的性能至关重要,特别是在食和运动方面.
- *温度波动显著影响脊椎动物的肌肉功能.
- * 迷宫鱼为研究各种肌肉角色和热适应提供了一个模型.
研究的目的:
- * 为了比较 (Tautogolabrus adspersus) 中的开 (sternhyoideus),闭 (adductor mandibulae) 和移动 (abductor superficialis) 肌肉的收缩动力学.
- * 调查温度 (7°C,15°C,22°C) 对这些鱼类肌肉收缩动学的影响.
- * 提供关于鱼肌收缩动态的新体外数据.
主要方法:
- * 隔离和体外测试从的初级运动器和部肌肉.
- * 使用肌肉机能计来控制肌肉的长度,刺激的持续时间和强度.
- * 将肌肉样本暴露在三个不同的实验温度下:7°C,15°C和22°C.
主要成果:
- * 运动肌 (游泳肌) 与肌相比,收缩和放松时间较慢.
- * 游泳肌肉在8Hz和15°C时产生的功率大于食肌肉.
- * 关闭肌肉在22°C时产生最大的力量,超过其他肌肉类型.
- * 尽管有功能差异,肌肉收缩动力学在肌肉类型和温度之间显示出显著的一致性.
结论:
- *这项研究为鱼开关肌的收缩动态进行了首次体外测量.
- *这些发现有助于我们更好地了解鱼类养和运动肌肉的生理能力和局限性.
- * 观察到的肌肉动力学热一致性为生理适应环境温度变化提供了洞察力.
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