True regarding excitation contraction coupling in smooth muscle is
Correct Answer: Presence of cellular calcium is essential to cause muscle contraction
Description: Ans. (d) Presence of cellular calcium is essential to cause muscle contraction(Ref: Ganong, 25th ed/p.116)Troponin is absent in smooth muscleSustained contraction (latch) occurs with less use of ATPPhosphorylation of myosin is required for smooth muscle contraction
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