ANATOMY
MUSCULOSKELETAL AND SOFT TISSUE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
By pulling and pushing
|
|
Through voluntary and involuntary actions
|
|
By contracting and relaxing
|
|
By moving up and down
|
Detailed explanation-1: -The biceps and triceps muscles are attached to the arm bones by tough connective tissues called tendons. The biceps muscles contract when a person bends his elbow and at that time triceps relaxes. In the opposite manner, the triceps muscles contracts while the person relaxes his elbow.
Detailed explanation-2: -The biceps and triceps act against one another to bend and straighten the elbow joint. To bend the elbow, the biceps contracts and the triceps relaxes. To straighten the elbow, the triceps contract and the biceps relax.
Detailed explanation-3: -Muscles can pull bones, but they can’t push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint. Then, when the movement is completed, the flexor relaxes and the extensor contracts to extend or straighten the limb at the same joint.
Detailed explanation-4: -When you contract your triceps your arm straightens and the angle between the forearm and the upper arm increases. You may have already guessed but this is called “extension” and you can see that in the left illustration below. These designations are intrinsic, meaning they are an unchangeable property of the muscle.
Detailed explanation-5: -Contraction of biceps brachii flexes the lower arm while the contraction of triceps brachii extends it.