In the Intestine, the Smooth Muscle Cell's

Multiple Choice

In the intestine, the smooth muscle cell's

A) force of contraction is graded by the extent of depolarization for slow waves whether an action potential is generated or not.
B) contraction requires an action potential but its force is graded by the extent of neurotransmitter released.
C) force of contraction is graded by the extent of depolarization for slow waves until an action potential is generated.
D) contraction requires an action potential and its force is therefore graded by the frequency of action potentials.
E) contraction is stimulated by motor neurons.