Muscle contracted to a size shorter than its resting length has less tension than one at resting length because:
A)Z discs will collide with thin filaments
B)Z discs will collide with thick filaments
C)H bands will widen
D)A bands will widen
E)none of these is a correct explanation for the reduced tension

Question

Quizplus · Accepted Answer

When a muscle is contracted to a size shorter than its resting length, the Z discs will start to move closer together and may eventually collide with the thick filaments. This can cause resistance to further shortening, resulting in less tension. The other choices are incorrect because collisions between Z discs and thin filaments, or widening of H bands or A bands, do not affect tension in the same way.

Muscle Contracted to a Size Shorter Than Its Resting Length