Temporal summation in skeletal muscle increases force bec...

Temporal summation in skeletal muscle increases force because:

hard

AThe muscle fiber action potentials increase in size with repeated stimulation

Ca2+ does not fully return to baseline between stimuli, so more cross-bridges can form

CActin filaments grow longer with each stimulus

DThe A band shortens with each stimulus

EAcetylcholine becomes permanently attached to receptors

Explanation

With rapid repeated stimulation, Ca2+ stays elevated, maintaining binding-site exposure and increasing the average number of active cross-bridges, raising force.

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Source: entermedschool.org

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