Which of the following statements is true about movement of the forearm? In
- bending the arm, the biceps relax and the triceps contract
-
bending the arm, the biceps contract and the triceps relax
- straightening the arm the biceps contract and the triceps relax
- straightening the arm, both biceps and triceps contract
The correct answer is: B
Explanation
To bend the arm, the biceps contracts and pulls on the radius. Simultaneously, the triceps relaxes.