Most Body Movements are _____ Contractions

Question

Most body movements are _____ contractions.
A)isotonic
B)isometric
C)a combination of isotonic and isometric
D)single twitch

Accepted Answer

Most body movements involve isotonic contractions, where the muscle changes length and produces movement. Isometric contractions, where there is no movement but the muscle contracts against a resistance, may also be involved in some movements but to a lesser extent. Single twitch contractions are brief contractions that are not sustained and do not produce movement.