In Smooth Muscle,actin and Myosin Filaments

question 1

Multiple Choice

In smooth muscle,actin and myosin filaments:

• A)Are organized into sarcomeres and aligned in a striated pattern.
• B)Overlap,with the actin filaments anchored at dense bodies.
• C)Overlap and contain a tropomyosin-troponin complex on the actin filament.
• D)Require phosphorylation of the myosin heavy chain to initiate muscle contraction.
• E)Typically generate contractile force in the absence of cytosolic Ca⁺⁺.

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