Músculos antagonistas

Muscles can only pull, not push, and are often arranged in pairs to allow movement in both directions. Extensor muscles, like the triceps, open joints, while flexor muscles, like the biceps, close them.

What is the primary action muscles can perform?

• Pull

• Rotate

• Twist

• Push

Why are muscles often arranged in pairs?

• To increase muscle size

• To exert force in both directions

• To reduce energy consumption

• To improve flexibility

Which muscle type is responsible for extending a joint?

• Flexor

• Stabilizer

• Extensor

• Rotator

What is the role of a flexor muscle?

• To open a joint

• To close a joint

• To stabilize a joint

• To rotate a joint

Which muscle in the human arm acts as an extensor?

• Biceps

• Triceps

• Pectoral

• Deltoid