When compared with skeletal muscle fibers, ventricular muscle fibers A) contract for longer. B) remain depolarized for a shorter period of time. C) exhibit stronger contractions. D) require less Ca²⁺. E) have a more abbreviated opening of voltage-gated Ca²⁺channels.

Question

Quizplus · Accepted Answer

Ventricular muscle fibers contract for longer due to a longer refractory period and slower removal of calcium ions from the cytoplasm.

When Compared with Skeletal Muscle Fibers, Ventricular Muscle Fibers