What are the attachment points of a muscle called?

• A. Insertion
• B. Origin and Insertion
• C. Origin
• D. Tendons

Answer: (B)

Attachment points on a muscle are called its origin and insertion. The origin is the end that typically stays relatively fixed during contraction, while the insertion is the end that moves toward the origin when the muscle contracts. Together, they describe where the muscle attaches to the skeleton and how the shortening of the muscle produces movement. Tendons are the strong connective tissues that transmit the force from muscle to bone, but the attachment points themselves are defined as the origin and insertion. Some muscles have more than one origin or insertion, as seen in muscles like the biceps brachii, which has two origins and a single insertion on the radius.