Question

the contraction of a muscle exerts a pull on a bone because group of answer choices muscle fibers directly attach to the periosteum of bone. muscles elongate upon contraction. muscles are attached to bones by tendons. muscles are attached to bones by bursae. muscles are attached to bones by ligaments.

Answer 1

Muscle contraction pulls on bones because muscles are connected to bones via tendons, which transfer the tension from the muscle contraction to the bones, facilitating movement.

Step-by-step explanation:

The contraction of a muscle exerts a pull on a bone because muscles are attached to bones by tendons. Tendons are strong bands of dense, regular connective tissue that connect muscles to bones, allowing skeletal muscles to cause bone movement when they contract. This contraction generates tension, which is transferred through the tendons to pull on the bones, causing movement at the joints.

Skeletal muscles have an origin and an insertion. The origin is attached to the fixed part of the skeleton, while the insertion attaches to the bone that moves during contraction. The muscle fibers contract and shorten, pulling the insertion closer to the origin, which results in movement of the skeleton.