Select the Description Below That Illustrates a Difference Between a Sphincter

question 76

Multiple Choice

Select the description below that illustrates a difference between a sphincter and circular muscle.

• A) A sphincter is a thickening of circular muscle that can prevent the movement of digesting materials while circular muscle is involved in propulsion digesting material.
• B) Sphincters are found throughout the GI tract while circular muscle is found only in the proximal portion of the GI tract.
• C) A sphincter is composed of smooth muscle while circular muscle is composed of skeletal muscle tissue.
• D) Sphincters are found in the proximal portion of the GI tract while circular muscle is found in the distal portions.

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