What are the differences between single-unit and multi-unit smooth muscle? (expected answers: 2) Select one or more: a. Multi-unit smooth muscle consists of single cells, the visceral smooth muscle consists of a cellular syncythiu b. Multi-unit smooth muscle is found mainly in the muscularis externa of the digestive canal. c. Muscle cell contraction is synchronous in the multi-unit smooth muscle. d. Visceral smooth muscle displays numerous gap junctions. e. Muscle cell contraction is synchronous in the visceral smooth muscle.

  
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