An increase in smooth muscle tension can occur at a given intracellular [Ca++] in response to:
A. opening K+ channels in the smooth muscle membrane
B. inhibition of myosin phosphatase by Rho kinase in the smooth muscle
C. cAMP-dependent phosphorylation of myosin light chain kinase in the smooth muscle
D. release of nitric oxide from adjacent endothelial cells
E. hyperpolarization of the smooth muscle membrane
ANS: B
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