Contractions in Which Muscles Shorten and Produce Movement are Known

Question

Contractions in which muscles shorten and produce movement are known as ________.
A) isotonic contractions
B) twitches
C) isometric contractions
D) resistance exercises

Accepted Answer

Isotonic contractions involve muscle shortening and movement, such as when lifting a weight or performing a bicep curl. Twitches are brief, involuntary contractions that are not under conscious control. Isometric contractions involve muscle tension without movement, such as when pushing against a wall. Resistance exercises are a broad category of exercises that can involve isotonic or isometric contractions.