A 20-year-old female has come to the clinic complaining of severe menstrual cramps. The clinic nurse practitioner knows that dysmenorrhea occurs when which muscle group contracts?
A)
Perimetrium
B)
Myometrium
C)
Endometrium
D)
Fundus
Ans:
B
Feedback:
The middle muscle layer, the myometrium, forms the major portion of the uterine wall. Contractions of these muscle fibers help to expel menstrual flow and the products of conception during miscarriage or childbirth. When pain accompanies the contractions associated with menses, it is called dysmenorrheal. The perimetrium is the outer layer of the uterus. Endometrium, the inner layer of the uterus, is made up of a basal and a superficial layer. The superficial layer is shed during menstruation and regenerated by cells of the basal layer. The fundus is the portion of the uterus that lies about the insertion of the fallopian tubes.
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