Which statement best describes how the body moves through muscle actions?

• A. Muscles push bones to create movement at joints.
• B. Muscles expand to push bones, resulting in movement.
• C. Muscles contract to push against the skin, causing movement.
• D. Muscles contract to pull on bones, creating movement at joints.

Answer: (D)

Verified step by step guidance

1. Understand that muscles are responsible for movement by interacting with the skeletal system.
2. Recognize that muscles are attached to bones by tendons, which allow them to exert force on the bones.
3. Learn that muscles can only contract (shorten) and not push; they pull on bones to create movement.
4. Identify that when a muscle contracts, it pulls on the bone to which it is attached, causing movement at the joint.
5. Conclude that the correct description of muscle action is that muscles contract to pull on bones, creating movement at joints.