Smooth muscle contractions are typically: Involuntary ( option 1 )
Smooth muscle contractions are made possible when myosin and actin filaments slide over each other and the hydrolysis of ATP provides the energy for this action. smooth muscle contractions occur without the interference of an individual hence is it an involuntary action.
Muscle that can be said to be voluntary is the skeletal muscle while Cardiac muscles are also classified as involuntary muscles
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