Cardiac muscle cells
A) twist when they contract
B) shorten when they contract
C) lengthen when they contract
D) contract by motor units
E) Both twist when they contract and shorten when they contract are correct.

Question

Quizplus · Accepted Answer

Cardiac muscle cells both twist and shorten when they contract. This twisting motion is part of the mechanism that helps pump blood more efficiently, while shortening is a fundamental aspect of muscle contraction that allows the heart to decrease in size and push blood out.

Cardiac Muscle Cells