Q:

What muscles are antagonistic pairs?

A:

Quick Answer

The BBC says that the biceps and triceps are antagonistic muscle pairs. Muscles can pull, but they cannot push. If there was only one muscle, then the limb wouldn't be able to get back into its original position. Antogonist muscle pairs are necessary for proper movement.

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Full Answer

The forearm is controlled by the biceps and triceps contractions. The BBC explains that the forearm moves downs when the triceps contract, and it moves up when the biceps contract. The movements succeed when the muscles get shorter.

Another example of an antagonistic muscle pair is the quadriceps and hamstrings. The BBC says that these muscles are responsible for extending and contracting the knee. The quadriceps contract to pull the lower leg forward, and the hamstrings contract to pull the lower leg backwards. The motion allows the leg to swing back and forth. The pair allows the arm to lift objects and put them down.

According to Aworkouts.com, the back and chest muscles are antagonistic muscle pairs. The back helps the body perform pull-ups, while the chest allows the body to do push-ups. The lower back and the abdominal muscles act as antagonistic muscle pairs as well. The abs contract forward when bending over, and the lower back contracts to pull the body upright.

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Related Questions

  • Q:

    What is an antagonistic muscle in the leg?

    A:

    According to the BBC, antagonistic muscles are pairs of muscles that work by alternately contracting and relaxing. In the human leg, the quadriceps and hamstrings are one example of antagonistic muscles. As York College explains, skeletal muscles always work in groups and never work in isolation.

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  • Q:

    How do antagonistic muscles work?

    A:

    Antagonist muscles work against agonist muscles to provide a pulling and pushing motion to areas of the body where muscles are attached to bones that form a joint. Examples of antagonistic muscles include biceps and triceps. In order to conduct a back and forth movement, the biceps act as the agonists to lift the forearm while the triceps relax as the antagonists to support the biceps' contractions, or vice versa.

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  • Q:

    What are some examples of voluntary muscles?

    A:

    The muscles used to move bones and the muscles in the face are voluntary muscles. Voluntary muscles are the muscles a person chooses to move, unlike involuntary muscles, which are the muscles that are not consciously controlled.

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  • Q:

    Where are involuntary muscles found?

    A:

    Involuntary muscles are found in the circulatory system, digestive system and urinary system. Humans do not exert any control over these muscles, which is why they are called involuntary.

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