Question

the up and down movements of our arm are controlled by _______ and _______ muscles. Is the answer is biceps and triceps... ​

Answer 1

Answer:

Triceps muscles contract and straightens the arm ,then the biceps muscles stretches or relaxes. By alternate contraction and relaxation of biceps and triceps muscles, we can bend or straighten the arm i.e. we can move the lower arm up and down. Biceps and triceps muscle just bent and straighten the arm.