The length tension-relationship in smooth muscle:
A. is similar to that in skeletal muscle, except smooth muscle can adapt to stretch
B. is similar to that in skeletal muscle, with an invariant optimal length range
C. shows a continual increase in force of contraction as the muscle is stretched
D. shows very little force development when only 50% of the myosin is phosphorylated
E. requires InsP3-induced Ca++ release from the SR
ANS: A
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