Which statement about the skeletal system as a series of joints and levers is true?
A) An extensor muscle moves a bone closer to the body.
B) Antagonistic pairs include an extensor muscle and a flexor muscle associated with the same joint.
C) Tendons hold together bones that meet at joints.
D) Ligaments attach muscles to bones.
E) The knee joint is a ball-and-socket joint.

Question

Quizplus · Accepted Answer

Antagonistic pairs of muscles include an extensor muscle and a flexor muscle associated with the same joint. When one muscle is contracting (flexor), the other muscle (extensor) is relaxing, allowing movement to occur.

Answer: D 
 Ligaments attach bones to other bones, while tendons attach muscles to bones. Both ligaments and tendons help to hold together the skeletal system at joints, but they serve different functions.

Answer: None of the above 
 None of the statements presented in the answer choices accurately describes the skeletal system as a series of joints and levers. An extensor muscle moves a bone away from the body, not closer to it, and the knee joint is a hinge joint, not a ball-and-socket joint.

Which Statement About the Skeletal System as a Series of Joints