In muscle anatomy, the distal attachment point of a muscle is called the:

• A. Insertion
• B. Tendon sheath
• C. Belly
• D. Origin

Answer: (A)

Verified step by step guidance

1. Understand the terminology related to muscle attachments: muscles typically have two main attachment points to bones or structures—origin and insertion.
2. The origin is the fixed or less movable attachment point of the muscle, usually located proximally (closer to the center of the body).
3. The insertion is the movable attachment point of the muscle, usually located distally (farther from the center of the body).
4. Recognize that the muscle belly refers to the thick, central part of the muscle where the muscle fibers are concentrated, not an attachment point.
5. A tendon sheath is a protective covering around a tendon, not an attachment point, so the distal attachment point of a muscle is called the insertion.