when a skeletal muscle contracts to cause a given movement, the more movable end of attachment of the muscle is termed
When a skeletal muscle contracts to cause a given movement, the more movable end of attachment of the muscle is termed its. origin. insertion. antagonist. synergist. When a muscle contracts, it usually has an opposing muscle that can cause movement in the opposite direction.
A muscle that has more than one attachment at locations that do not move, called origins, and only one attachment at the location that does move, called the insertion, is said to have more than one head. The term biceps means two heads; the term triceps means three heads; and the term quadriceps means four heads.