0
What will happen if only 1 muscle is used to bend and straighten the arm?
Wiki User
∙ 9y ago
Two muscles are needed, one to extend the other to close
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
Why muscles have to work in pairs?
Skeletal muscles only pull in one direction. For this reason they always come in pairs. When one muscle in a pair contracts, to bend a joint for example, its counterpart then contracts and pulls in the opposite direction to straighten the joint out again.
Do you use both the bicep and the tricep to straighten the arm?
No. Try and feel. Only triceps is contracted, biceps bend the arm over the elbow joint.
What type of muscle bend in only one direction?
Muscles don't bend at all, technically, joints and bones do, but in concept it would be the bicep and tricep because your elbows only move in 1 direction.
Why do muscles need bones in order for the body to move?
AnswerThough not all muscles work in pairs, the general principle is that one muscle moves a bone one way, and the other muscle moves it the opposite way. Why? Because muscles can only pull, not push.For example, when you bend your arm, the biceps muscle pulls. When you want to straighten it, the biceps muscle cannot push it back. Instead, the triceps muscle that's on the back of the arm pulls in the other direction.
How and when can you straighten your permed hair?
You can straighten it everyday if you want to, it will only come out faster. so, try to straighten it only once or twice a week to keep your permed hair. What's the point of getting a perm, if you are going to straighten it?
Does the muscle pull the bone in one direction and the other in the opposite?
Let's take your arm as an example. you have the bicep and the tricep. all muscles come in pairs. they can only push, not pull. your bicep connects to the top of your hinge joint in your elbow, and your triceps connect to the bottom. your bicep pulls to bend your arm, and your triceps pulls to straighten your arm. Was that a too complicated answer?
Why are skeletal muscles often found in opposing pairs?
Skeletal muscles are found in pairs called flexors and extensors. The flexors bend a joint, and the extensors straighten the joint. Muscles cannot push; they only pull.
Why does your index finger hurts when you try to bend it?
It depends on which way you might bend it. If you find that it hurt when you make a fist, you may have nerve problem, muscle problem or joint problem. Only a doctor who takes a look at it can tell you.
Can you straighten a curly wig?
You can only straighten a curly wig if it is made out of real hair. if it's not its pretty impossible!! ;] hope this helps!
If a muscle is a voluntary muscle what does that mean?
The tricep muscle is mainly responsible for the straightening of the arm. This means that the tricep muscles are voluntary, and will only move if we wish to straighten out our arms.
Why do tigers crouch before jumping?
Because in order to jump they have to straighten out their bodies, and the only way to be able to straighten out is if the crouch up first.
What does muscles work in pairs mean?
Skeletal muscles are arranged as opposing pairs because, although they can shorten themselves by contracting, they have to be stretched back to their former length by other muscles. An example of opposing muscles is in the arm, where the biceps and triceps have opposite actions. As one muscle shortens, the other is stretched. The biceps contracts to bend the arm at the elbow while the triceps stretches. To straighten the elbow joint, the triceps contracts, while the biceps stretches.
