Which of These Is a Major Difference Between Smooth Muscle and Skeletal

question 22

Multiple Choice

Which of these is a major difference between smooth muscle and skeletal muscle?

• A)Myosin is the main regulatory protein in smooth muscle.
• B)Myosin is the main regulatory protein in skeletal muscle.
• C)Skeletal muscle usually exhibits spontaneous activity,while smooth muscle cannot contract spontaneously. 
• D)Only skeletal muscle requires increased calcium ion concentration in the cytosol for contraction.
• E)Only skeletal muscle has both actin and myosin.

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