How do pennate muscles compare to fusiform or strap muscles with respect to ability to generate tension? What causes whatever differences to exist?
What will be an ideal response?
ANS: Fusiform and strap muscles have a large contractile range because of the length of their fibers,
which run the length of the muscle. Because of the large contractile range, however, they are not
able to generate large amounts of tension (increased shortening leads to decreased tension
production). Pennate fibers are short and connect to a single tendon that runs the length of the
muscle. In this arrangement, the fibers do not have much of a contractile range because of the
shortness, but they are collectively able to generate a large amount of tension on the tendon
(decreased shortening capability leads to an increased tension production capability).
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