Which of the Following Statements Is True About GI Muscle

Multiple Choice

Which of the following statements is true about GI muscle contractions?

A) Phasic contractions last only seconds and occur in the stomach and small intestine.
B) Tonic contractions are sustained for minutes and occur in the small intestine.
C) Cycles of smooth muscle contraction and relaxation are associated with fast wave potentials.
D) Contractions of the smooth muscle do not depend on calcium.
E) None of these statements are true.