A) a muscle working in opposition to another muscle. B) the end of the muscle where the action occurs. C) the muscle that does most of the movement. D) the stationary end of the muscle. E) a group of muscles that work together to cause movement.
Which of the following represents a class I lever system?
A) Crossing your legs B) Hyperextension of the head C) Standing on your tiptoes D) Flexion of the elbow to elevate the hand E) Lifting weight with your arm