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The biceps flexes the arm it does not extend it (straightens). The triceps brachii extends the arm. They do work together. If one is damaged and doesn't work as it should, the movement will be "jerky" and not smooth.
Wiki User
∙ 8y ago
Wiki User
∙ 15y agoIt isn't. The arm is bent by the flexor muscles (mostly just the biceps), and straightened by the extensor muscles (ie. the triceps).
Wiki User
∙ 13y agoMuscles only have the ability to contract and relax. They can't push.
Wiki User
∙ 12y agoBecause your arm is flexable!
Nadeeka Medawatta
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What will happen if only 1 muscle is used to bend and straighten the arm?
Two muscles are needed, one to extend the other to close
What is the opposing muscle of the bicep?
bicep- it bends the arm while the triceps straighten the arm.
What two groups of are the two group of muscles arm?
biceps and triceps
The triceps and biceps are?
Muscles in your arm.These are the muscles of your upper arm.
Which two muscle work in opposite way to make the arm move?
forearm and upper arm muscles.
What causes abduction of the arm?
There are two muscles that move the arm away from the body (abduction), the supraspinatus and the deltoid.
What is the shoulder muscle and the two arm muscles?
deltoids; biceps,triceps
How does muscle action result in the movement of body parts?
The arm is made up of two main muscles (biceps & triceps) for the arm to move one of these muscles must contract and the other must relax. Which muscle does which depends on which way you are moving your arm.Additional answerThis does not mention the muscles in the forearm, which mainly move the hand, or the muscle in the shoulder, deltoid, which lifts the arm.
What pair of muscles in the upper arms is used when playing the violin?
there is only two muscles in the upper arm, the triceps and the biceps
How do muscles work in pairs to move a bone?
Well you have two muscles in your arm: the bicep and tricep. In order to make the arm move the two muscles must flex while the other extends and vice versa. So the bicep flexes and the tricep extends (the arm is bent). The bicep extends and the tricep flexes (the arm is straight)
What does it mean when right arm moves without thought?
It means that you naturally move your arm with out thinking that your going to move it. There are two types of muscles; voluntary muscles and involuntary muscles. Voluntary muscles are muscles that you think about to move sometimes and involuntary muscles are muscles that you don't think about moving. An example of an involuntary muscle would be your heart and an example of a voluntary muscle would be your arm even though you don't really have to think about it when you move it.
What happens to your upper arm muscles when you arm at the elbow to eat your favorite sandwich?
for example when you eat a bologna sandwich on rye, the fulcrum in your arm levers the joints in your body. This causes there to be a friction between the two muscles, causing your elbow to properly bend.
