Question

protein is absent in smooth muscle.
(a) Myosin
(b) Actin
(c) Troponin (d) Tropomyosin​

Answer 1

Answer:

Smooth muscle uses actin and myosin filaments for contraction. The mechanism, illustrated in Figure 5-10, differs from that in skeletal muscle. Smooth muscle has tropomyosin but lacks troponin C. Calcium acts through calmodulin to activate myosin light-chain kinase to phosphorylate the myosin heads.

Explanation:

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Answer 2

Smooth muscle is the least specialized muscle and contain no troponin. Smooth muscle contain myosin, actin and tropomyosin.