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What muscle must contracts to straighten the arm?
When you straighten your arm your bicep is relaxed and your tricep is contracted.
How does the triceps and biceps work together to straighten your arm?
When lowering arm biceps relax and triceps contracts. When one contracts the other relaxes when you move it forward and downward.
What is an antagonist in anatomy?
The term means to act against and it is often used when talking about muscle actions. When one muscle or groups of muscles contracts, the opposite acing muscles must relax. These are called antagonists of each other. When the Biceps Brachii flexes the forearm, the Triceps Brachii must relax.
Would the triceps or biceps be bigger when lifting weights?
Many people have the misconception that biceps play an important role in Weightlifting. The biceps muscle is relatively unimportant in good weightlifting technique. The force for lifting and accelerating the bar is produced in the legs and the quadriceps is the main muscle group. The triceps play an important part in holding weights overhead. The function of the tricep is to straighten the arm, and in holding a weight overhead the elbows must be locked out and the triceps make this happen.
Is it true The Antagonist muscle to the Biceps is the Deltoids?
No it is not true, the antagonist muscle to the biceps is the triceps. You have to think of what muscles will have to release in order to allow contraction, another example would be when the quadriceps contract, your hamstrings must release otherwise the work of the muscles would contradict one another.
What muscle moves the upper arm back and inwards towards the body?
The biceps, pectoralis, and trapezius.
Why do you need both biceps and triceps to move the lower arm up and down at the elbow?
Because muscles can not push, they can only pull (contract). So while your biceps contract to pull the arm up into a flexed position; the triceps are necessary to pull the arm back down into an extended position. Skeletal muscles or groups of skeletal muscles must work in pairs. These pairs are called "antagonistic" muscles; while one group is contracting, the other group is relaxing. You can easily feel this action in your arm. With your right arm extended, place you left hand on your right biceps. Flex your arm (as if to make a big muscle) and you will feel the biceps brachii tighten and bulge somewhat; we are familiar with this. Now, place your left hand on your triceps and straighten the right arm completely (extra straight) and you should be able to feel the triceps brachii tighten. Although aided by gravity, the triceps MUST contract to straighten the arm.
If someone wanted to get bigger biceps or triceps what will the person do to achieve that?
He would have to go to the gym and start working out properly. He must concentrate on exercises that are designed to build the biceps and triceps likeBiceps:Barebell curlsDumbbell curlsHammer curlsPreacher curlsConcentration curlsTriceps:Close grip bench pressReverse dipsPulley press downOne arm dumbbell extensionFrench press
What antagonists muscle must relax to allow a maximal effort at the bench press?
biceps brachii
Why skeleton muscles or voluntary muscles are arranged in antagonistic pairs?
Voluntary Muscles can contract or pull but, they cannot push. When they are finished pulling and are relaxed, their antagonists on the other side of the couple must pull the joint back.
Who has the worlds largest bicep?
Gregg Valentino is credited as having the world's largest biceps. He started bodybuilding at the age of 13 and his body responded extremely rapidly. By the time he was in his late teens he had already developed an outstanding physique at only 160lbs with 18 inch arms. Gregg claims after 23 years of training naturally he decided to experiment with steroids. During this time his arms grew from an impressive a natural 21" to an enhanced 28".
In order to move a bone each muscle must cross at least one what?
Joint. A muscle must cross a joint to move the insertionbone relative to the bone of origin. For example, the biceps spanning the elbow joint and the quadriceps spanning the knee joint.
