Physiology Muscle Physiology c9f719a7

True regarding excitation contraction coupling in smooth muscle is

Presence of troponin is essential

Sustained contraction occurs with high calcium concentration

Phosphorylation of actin is required for contraction

Presence of cellular calcium is essential to cause muscle contraction

High-Yield Explanation

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

True regarding excitation contraction coupling in smooth muscle is

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