Which of the following is a true statement about bones?

• A. Bones Contract As You Move.
• B. Some Bones Are Flexible To Allow For Greater Freedom Of Movement.
• C. Bones Are Used As Lever Arms To Facilitate Body Movements.
• D. There Are 197 Bones In The Adult Human Body.

Answer: (C)

Movement relies on bones acting as lever arms around joints, with muscles pulling on them to create torque and rotate limbs. The bone-transmitted force through joints provides the leverage needed to move the body and perform actions like lifting, walking, and reaching.

The statement that bones are used as lever arms to facilitate body movements captures this essential interaction between bones, joints, and muscles. Bones provide rigid levers; muscles attach via tendons and pull on them to produce motion.

Bones do not contract; muscles do. Bones are rigid structures, and flexibility comes from joints and surrounding tissues, not the bones themselves. The adult human skeleton typically has about 206 bones (there can be small variations among individuals), not 197.