Contractility of cardiac muscle depends on
Excitation and contraction coupling is there in cardiac muscle. When an action potential reaches the T tubules there is activation of Dihydropyridine channels. This causes influx of extracellular calcium into sarcoplasm. Ref: Textbook of medical physiology by N Geetha, 2nd edition, page no. 53
On T tubules
On T tubules and extracellular Ca2+
On extracellular Ca2+
On intracellular Ca2+
Cardiovascular system