Question

What are antagonistic muscles?Give one example.

Concise Biology Class IX By H.S. Vishnoi CHAPTER 14-MOVEMENT AND LOCOMOTION

Answer 1

Answer:

In your upper arm, there are two main muscles. Go ahead and make an arm curl to see how big your biceps, or upper arm muscle, is.

While you are squeezing and contracting your biceps muscle to flex your arm, the biceps is carrying out the main movement, and so it is the agonist muscle. There's another muscle on the underside of your upper arm, called the triceps, or lower arm muscle. The triceps in this case is the antagonist muscle, relaxing and providing movement control while the biceps does the main contraction and movement. An antagonist muscle, just like the antagonist in a novel, works opposite to the main character, which in this case is the agonist muscle that undertakes the main action of movement.