Which describes how muscles generate movement?

Which describes how muscles generate movement?

• A. They pull only
• B. They push only
• C. They pull and push
• D. They relax

Answer: (A)

Movement is produced when muscles contract, shortening and pulling on bones via tendons to move a joint. They generate force only by pulling; they don’t push bones away. Movement often involves opposing muscle pairs, where one contracts to produce a motion and its partner relaxes or lengthens to allow it. So, describing muscles as pulling only best captures how muscle action creates movement. Descriptions that say they push, or that rely on relaxation alone, don’t fit how muscles generate motion.

Movement is produced when muscles contract, shortening and pulling on bones via tendons to move a joint. They generate force only by pulling; they don’t push bones away. Movement often involves opposing muscle pairs, where one contracts to produce a motion and its partner relaxes or lengthens to allow it. So, describing muscles as pulling only best captures how muscle action creates movement. Descriptions that say they push, or that rely on relaxation alone, don’t fit how muscles generate motion.