In comparison to skeletal muscle fibers,the contractile fibers of the heart are depolarized for _____ period of time.

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The contractile fibers of the heart are depolarized for a longer period of time compared to skeletal muscle fibers. This is because the action potentials in cardiac muscle cells last longer due to the presence of calcium ion channels. The prolonged depolarization also allows for coordinated contraction of the heart chambers. Skeletal muscle fibers, on the other hand, have shorter action potentials that allow for faster contractions and greater force generation.

In Comparison to Skeletal Muscle Fibers,the Contractile Fibers of the Heart