This video presents important concepts related to Excitation - Contraction Coupling of Smooth Muscles. It makes topics rather easy to grasp and difficult to forget! Timeline: 00:00 Introduction 00:40 Smooth Muscle - Features 01:02 Calcium Channel 02:04 Calcium - Calmodulin Complex 03:33 Actin and Myosin 04:15 Myosin Kinase and Myosin Phosphatase 06:28 Relaxation 07:14 Sarcoplasmic Reticulum and Calcium 08:33 Conclusion