The sequence of events that cause a sarcomere to contract can be summed up in the correct order as
A)detach, extend, contract, attach.
B)detach, pull, extend, contract.
C)detach, extend, attach, pull.
D)pull, contract, detach, recoil.

Question

Quizplus · Accepted Answer

The correct sequence is detach, extend, attach, pull. This describes the cycle of myosin heads in muscle contraction: they detach from actin, extend (re-cock), attach to a new position on actin, and then pull (power stroke) to contract the sarcomere.

The Sequence of Events That Cause a Sarcomere to Contract