Question

which term means \an incision into a sphincter muscle\? myospincteritis myospincterectomy myospincterotomy myospincternecrosis

Explanation:

To determine the correct term, we analyze the suffixes:

• "-itis" means inflammation (so "myospincteritis" is inflammation of the sphincter muscle).
• "-ectomy" means removal (so "myospincterectomy" is removal of the sphincter muscle).
• "-otomy" means incision (so "myospincterotomy" is an incision into the sphincter muscle).
• "-necrosis" means tissue death (so "myospincternecrosis" is necrosis of the sphincter muscle).

Since the question asks for the term meaning "an incision into a sphincter muscle", the correct term is "myospincterotomy".

Answer:

C. myospincterotomy