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One group of muscles contracts, and the other group extends. As an arm moves down, the bicep muscle (the one that faces the front side of the body and goes from the shoulder to the elbow) relaxes. When the muscle relaxes, it goes from being contracted to elongated. This relaxation happens at the same time that the tricep muscle (the one that faces the backside of the body and goes from the shoulder to the elbow) contracts. This happens because the human body's skeletal muscles have what can be considered compliments. I say this to mean that when a muscle relaxes, there is a muscle that contracts simultaneously. Therefore, they move antagonistically to each other. This is to serve the purpose of creating specific movements that help assist in locomotion. On the molecular level of what happens when a muscle contracts and relaxes, the actin and myosin filaments in muscle fiber overlap to contract and separate to relax.
What else can I help you with?
When you flex your arm muscle what happens?
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
What happens to the triceps when you put your arm down?
Putting your arm down engages the triceps. The primary function of this muscle is to allow you to straighten your arm at the elbow. The tricep is the antagonist of the bicep.
The infraspinatus muscle is a muscle that moves the?
lateral rotation of humerus (upper arm)
What happens to the muscle when the arm is bent?
Which muscle? The biceps, at the front of the arm, get shorter, and the triceps, at the back, get longer.
How your arm moves and down?
With your muscles.
What muscle pulls your arm down?
shoulder
What happens when you pull on a chicken wing's arm muscle?
you will get hurt
What happens to the muscle fibers in your biceps when you bend your arm?
it contracts
What happens to your upper arm as you raise the lower arm?
The biceps brachii muscle will contract, pulling the lower arm up.
When you perform flexion on your arm the biceps muscle contracts What happens to the triceps muscle on the posterior of the arm as you do this action?
The Triceps extend (Stretch out) as the biceps contract.
What muscle straightens the arm?
The triceps are responsible for straighting and the bicep is for curling muscle.
What muscle enables you to push and moves the arm?
The triceps brachii muscle is responsible for extending the forearm and allowing you to push objects away from your body. It is located on the back of the upper arm and is activated when straightening the arm.
