Question

To move ‘the lower arm up and down two type of muscles are required. They are

• A. Triceps and Smooth muscles
• B. Smooth muscles and Cardiac muscles
• C. Biceps and Cardiac muscles
• D. Biceps and Triceps

Answer 1

The correct option is D Biceps and Triceps

To move ‘the lower arm up and down two type of muscles called biceps and triceps are required.
When we raise our lower hand, the biceps in front become short by contraction and the triceps at the back stretch to pull up the arm.
When we lower our arm, the triceps at the back contract and biceps stretch to pull the arm down.