The mechanical force of contraction is generated by ________.
A) shortening of the thick filaments
B) shortening of the thin filaments
C) a sliding of thin filaments past thick filaments
D) the "accordion-like" folding of thin and thick filaments
E) the temporary disappearance of thin filaments

Question

Quizplus · Accepted Answer

The mechanical force of contraction is generated by the sliding of thin filaments past thick filaments. This occurs as the cross-bridges on the myosin heads attach to the actin on the thin filaments and swivel to pull the thin filaments towards the M-line, causing the sarcomere to shorten.

The Mechanical Force of Contraction Is Generated by ________