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Sagot :
Final answer:
The triceps extends the arm while the biceps flexes it, working as an antagonistic pair.
Explanation:
The triceps muscle is the extensor responsible for extending the arm at the elbow by contracting, while the biceps muscle is the flexor that bends the arm. Together, they form an antagonistic pair of muscles that work in opposition to each other.
Learn more about Muscle Contractions here:
https://brainly.com/question/33378824
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