In contraction of gastrointestinal smooth muscle, which of the following events occurs after binding of $\mathrm{Ca}^{2+}$ to calmodulin?

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[VII B]. The steps that produce contraction in smooth muscle occur in the following order: various mechanisms that raise intracellular $\mathrm{Ca}^{2+}$ concentration, including depolarization of the sarcolemmal membrane, which opens voltage-gated $\mathrm{Ca}^{2+}$ channels, and opening of ligand-gated $\mathrm{Ca}^{2+}$ channels; $\mathrm{Ca}^{2+}$-induced $\mathrm{Ca}^{2+}$ released from SR; increased intracellular $\mathrm{Ca}^{2+}$ concentration; binding of $\mathrm{Ca}^{2+}$ to calmodulin; increased myosin-lightchain kinase; phosphorylation of myosin; binding of myosin to actin; cross-bridge cycling, which produces contraction

In Contraction of Gastrointestinal Smooth Muscle, Which of the Following Ca2+\mathrm{Ca}^{2+}Ca2+

In Contraction of Gastrointestinal Smooth Muscle, Which of the Following $\mathrm{Ca}^{2+}$