During a concentric contraction of muscle
A) The A band shortens
B) The I and H zone shorten while the A band stays constant
C) The I band shortens while the H and A band stay constant
D) A, I and H bands all shorten
E) The A band shortens while the I band stays constant

Question

Quizplus · Accepted Answer

During a concentric contraction, the I band and H zone shorten as the actin and myosin filaments slide past each other, while the A band remains constant in length.

During a Concentric Contraction of Muscle