The right answer is Strain
That would depend on the joint. The knee joint is straightened with the quadricep muscle (thigh). And the elbow joint is straightened with the tricep muscle (back of the arm)
Ligaments
Perhaps extensor muscles. (ligaments function to hold joints together, they are not muscles.)
A muscle that straightens a joint is called an extensor.Extensors are the muscles whose contraction extends or straightens a limb or other part of the body.Extensor muscle
Extensor muscles extend or straighten a body part.
Being sunburned can cause fatigue, but does not usually cause muscle aches specifically.
Muscles that cross two joints and act on both joints are called biarticular muscles. These muscles can generate movement at both joints they cross, which can have implications for muscle function and coordination during activities involving those joints.
It varies with the joint, but as a rule there are always at least two. (So that they can oppose each other ... note the finger joints - to flex and straighten.)
When you Bend your Leg your hamstring contracts and your quadriceps relax
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.
Excercise helps keep the bones strong and the joints and muscles supple and strong. Lack of excercise can cause bones to become weaker and joints to become less mobile.
The right answer is StrainThat would depend on the joint. The knee joint is straightened with the quadricep muscle (thigh). And the elbow joint is straightened with the tricep muscle (back of the arm)LigamentsPerhaps extensor muscles. (ligaments function to hold joints together, they are not muscles.)
The muscles used to straighten the leg are commonly known as the Quadriceps, a group of four muscles on the front of the thigh. This, however, is only the cast when the knee is isolated. If you were to stand up from a squatted position, you would also be using your gluteal muscles as well as your hamstrings to extend the thigh and stabilize the knee, while your quads and inner thigh muscles (the adductor) help to straighten the the knee. You would also be using your calf muscles to straighten the ankle.
When you straighten your fingers out, you are extending them. Flexing refers to bending the joints to decrease the angle between bones, while extending refers to straightening the joints to increase the angle between the bones.
All the synovial joints that are used in normal daily activities, like the muscles and joints of the arms and legs.