What Is Responsible for Initiating Contraction of Smooth Muscle

question 179

Multiple Choice

What is responsible for initiating contraction of smooth muscle?

• A)Stimulation by motor neurons
• B)Inhibition of acetylcholinesterase
• C)Membrane potential drifting to threshold as a result of automatic changes in ion movement across the membrane
• D)Excitation of the gap junctions by a transmitter substance
• E)Stimulation by the autonomic nervous system

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