According to the sliding filament model of muscle contraction, a sarcomere contracts when its
A)thick filaments slide across its Z lines.
B)thin filaments slide across its Z lines.
C)thin filaments slide toward each other across its thick filaments.
D)thick filaments shorten, pulling the opposed sets of thin filaments past each other.

Question

Quizplus · Accepted Answer

In the sliding filament model, muscle contraction occurs when thin filaments (actin) slide toward each other across the thick filaments (myosin), shortening the sarcomere.

According to the Sliding Filament Model of Muscle Contraction, a Sarcomere