How and why do muscles work in pairs to move the body?

What muscles work in pairs?

Skeletal muscles work in pairs

For instance, if you bend your elbow, your biceps (muscles on the front of the upper arm) contract and the triceps (muscles on the back of the upper arm) relax. It works the other way if you straighten your arm – the triceps contract while the biceps relax.

Why do muscles work in pairs Class 5?

Muscles are attached to bones by tendons and help them to move. … Muscles can only pull and cannot push. Therefore muscles have to work in pairs to move a joint. One muscle will contract and pull a joint one way and another muscle will contract and pull it the other.

How muscles work in movement of bones?

Muscles provide the tug on the bones needed to bend, straighten, and support joints. Muscles can pull on bones, but they can’t push them back to their original position, so the muscles work in pairs of flexors and extensors. The extensor muscle relaxes and stretches as the flexor muscle contracts to bend the joint.

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Do muscles usually work in pairs?


Muscles usually work in pairs or groups, e.g. the biceps flexes the elbow and the triceps extends it. This is called antagonistic muscle action. The working muscle is called the prime mover or agonist.

What are the 4 types of muscles?

Different types of muscle

  • Skeletal muscle – the specialised tissue that is attached to bones and allows movement. …
  • Smooth muscle – located in various internal structures including the digestive tract, uterus and blood vessels such as arteries. …
  • Cardiac muscle – the muscle specific to the heart.

What are the six major types of muscles?


  • Comparison of types.
  • Skeletal muscle.
  • Smooth muscle.
  • Cardiac muscle.
  • Skeletal muscle.
  • Smooth muscle.
  • Cardiac muscle.

How can we keep our muscles in good shape?

Top Five Tips for Keeping your Muscles Healthy

  1. Warm Up and Cool Down. Before beginning any sort of physical activity, it’s crucial to spend 10-20 minutes warming up. …
  2. Stretch. Spending 10-15 minutes stretching your main muscle groups can drastically reduce muscle tears. …
  3. Diet. …
  4. Hydrate. …
  5. Exercise.

How do muscles get stronger?

Muscle cells subjected to regular bouts of exercise followed by periods of rest with sufficient dietary protein undergo hypertrophy as a response to the stress of training. … Because there are more potential power strokes associated with increased actin and myosin concentrations, the muscle can exhibit greater strength.

Why do we need two muscles to make a movement?

Hint:Muscles move body parts by getting a contract and then relax that is back to position. Muscles can pull bones however; they cannot push them back to the previous position, to do so they work in pairs of flexors and extensors.

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Did you notice how muscles are attached to bones?

Skeletal muscles are attached to the skeleton by tough connective tissues called tendons(see Figure above). Many skeletal muscles are attached to the ends of bones that meet at a joint. The muscles span the joint and connect the bones. When the muscles contract, they pull on the bones, causing them to move.