Question

Name the antagonistic muscles of upper arm of human being.

Answer 1

Muscles often work in pairs against each other. These are called antagonistic pairs.

Biceps and triceps are the pair of antagonistic muscles in the upper arm.

• The muscles in the upper arm control the bending and straightening of the arm.
• When the bicep contracts the lower arm is raised and the arm bends.
• In this position the triceps muscle is relaxed.
• To straighten the arm the reverse happens.
• The triceps contract straightening the arm, while the bicep relaxes.