Músculos asombrosos

The video explains how skeletal muscles, attached to bones, enable movement by contracting and relaxing. Muscles work in pairs, as they can only pull, not push. For example, the bicep and tricep work together to move the arm, while the hamstring and quadriceps coordinate to move the leg. This cooperation allows for complex movements and highlights the importance of muscle pairs in the body.

What is the primary function of skeletal muscles?

• To push bones

• To pull bones

• To relax bones

• To strengthen bones

Why are muscles positioned in pairs?

• To push and pull bones

• To only push bones

• To only pull bones

• To allow for both contraction and relaxation

What happens when the bicep contracts?

• The arm rotates

• The arm remains still

• The arm straightens

• The arm bends

Which muscle contracts to straighten the arm?

• Bicep

• Quadriceps

• Triceps

• Hamstring

What is the role of the quadriceps in leg movement?

• To rotate the leg

• To straighten the leg

• To relax the leg

• To bend the leg