A muscle fiber generates maximum contractile force when
A) it has been exposed to creatine phosphate.
B) it has been stretched excessively.
C) it receives repeated action potentials from a motor neuron.
D) some of the myofibrils contract and then relax at the same time.

Question

Quizplus · Accepted Answer

Muscle fibers generate maximum contractile force when they receive repeated action potentials from a motor neuron, as this leads to a sustained and increased level of calcium ions in the cytoplasm, enhancing the force of contraction through a process known as frequency summation.

A Muscle Fiber Generates Maximum Contractile Force When