Month: March 2011

They have a reduced content of contractile

They have a reduced content of contractile proteins, and a much higher conduction velocity, than ordinary cardiomyocytes. The conducting bundles divide repeatedly as they spread out through the myocardium to coordinate electrical and contractile activity across the heart. Acetyl choline, acting through M2 muscarinic receptors, reduces the spontaneous firing rate of the sinoatrial node, and [Continue]