The homecare nurse is making a home visit to a 51-year-old female client with a long-standing diagnosis of multiple sclerosis
The nurse knows that the muscle wasting and weakness associated with the disease process are ultimately manifested as a failure of what normal process in muscle tissue?
A)
The contraction of the epimysium
B)
The surrounding of fascicles by perimysium
C)
Thick myosin and thin actin filaments sliding over each other
D)
The contraction of fascicles within myofibrils
Ans:
C
Feedback:
The contraction of skeletal muscle tissue can be characterized as the sliding action of myosin and actin. Epimysium surrounds and plays a supportive role in the skeletal muscle, and perimysium similarly provides support but does not actively produce locomotion. Myofibrils are found within fascicles, not the opposite.
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