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looking at the arms, it's the triceps and some portions of the deltoid.
Wiki User
∙ 15y ago
Wiki User
∙ 9y agothe biceps
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What happens to muscles when you straighten your arm?
There are many arm muscles. The triceps (on the back of your upper-arm) contract when you straighten your arm, and the biceps (the front of the upper-arm) relaxes.
Which muscles straighten the arm?
no it isnt because the arm is bent by the flexor muscles (mostly just the biceps), and straightened by the extensor muscles (ie. the triceps).
What do the triceps and biceps muscles do?
The triceps muscles extend (straighten) the arm, while the biceps muscles flex (bend) it at the elbow joint.
What organs are able to contract and shorten?
our arm muscles ar abl to contract or move
What muscle causes a joint to straighten when it contracts?
The muscle that causes a joint to straighten when it contracts are the extensor muscles. These include the triceps that work with the biceps to extend the arm.
Describe the action of your muscles when you bend your arm and then straighten it again?
The muscles in your arm never expand; so when you bend your arm, your biceps contract as your triceps return to their regular form. When you extend your arm, you triceps contract as your biceps return to their regular form.
What happens to the bleeps when you straighten your arm?
what happen to the bleeps when you straighten your arm
What muscle can do?
Muscles can contract and shorten
How do muscles work with bones to straighten the bent arm?
Well remember that the musleoves the bone one way and that one way is the bent
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 are the muscles in the upper arm that cause it to straighten?
Tricep brachii is responsible for extension (straightening) of the arm at the elbow. There are 3 heads of the Tricep; the long, lateral and medial heads. The Tricep is an antagonist of the bicep and brachialis muscles of the upper arm, which both assist in flexion at the elbow joint.
Why do you need two muscles to straighten your arm?
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.
