How oxygen (O₂) supply to capillaries is regulated to match the tissue's demand is unknown. Erythrocytes have been proposed as sensors in this regulatory mechanism since they release ATP, a vasodilator, in an oxygen saturation (SO₂)-dependent manner. ATP causes hyperpolarization of endothelial cells resulting in conducted vasodilation to arterioles.

中文翻译：

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毛细血管在调节骨骼肌供氧中的作用的证据

如何调节毛细血管的氧气 (O ₂ ) 供应以匹配组织的需求尚不清楚。_{由于红细胞以氧饱和度 (SO 2} ) 依赖性方式释放血管扩张剂 ATP，因此已提出红细胞作为该调节机制中的传感器。ATP 引起内皮细胞的超极化，导致对小动脉进行血管舒张。