Which of the following is a true statement about smooth muscle ?
Smooth muscle cells Lack sarcomeres. Instead, actin filaments are arranged obliquely in the cytoplasm. Some filaments have their plus ends anchored at points in the plasma membrane termed dense plaques, whereas other filaments have plus ends anchored in dense bodies in the cytosol. Option 1: Skeletal (not smooth) muscles have multiple nuclei in the sarcoplasm, just beneath the sarcolemma. Option 2: Striations are present in skeletal & cardiac muscles (not smooth muscles). Striations appear due to regular arrangement of myofilaments in sarcomeres. Option 4: Unlike skeletal muscle, there are no cross bridges formed in the smooth muscle during contraction but instead it has a regulatory protein molecule called calmodulin.
Have multiple nuclei
Have striations
Sarcomeres are absent
There are cross bridges formed in the smooth muscle during contraction
Systemic histology