# Epi 60 - ICU Primary Snippet 3 - Smooth muscle cell - Excitation- contraction coupling

Learn about the physiology of smooth muscle cell contraction and its differences compared to skeletal muscle. Explore the absence of t-tubules and troponin, presence of calmodulin, types of fibers, stimulation mechanisms, and cross-bridge formation during contraction. Discover how myosin light chain phosphatase aids in relaxation.