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Consider two muscles of equal volume, one of which is parallel-fibered and the other is pennate:

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Parallel-fibered musclePennate muscle


For each of the following properties quantities in a typical Hill-type muscle model, which of the two muscles would have a larger parameter greater value and why?

(a) Number of sarcomeres in series

(b) Optimal fiber length (in cm)

(bc) Maximum isometric force (in N)

(cd) Width of force–length curve (in cm)

(de) Maximum shortening velocity (in cm/s)

(e) Number of sarcomeres in series

(f) Force in the tendon (in N)


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S5.5 Parallel-fibered and pennate muscles
S5.5 Parallel-fibered and pennate muscles

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