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The muscle that causes a joint to straighten when it contracts are the extensor muscles. These include the triceps that work with the biceps to extend the arm.
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Tricep.
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The muscle that causes a joint to straighten when it contracts is called an extensor. Extensors work by increasing the angle between the bones at a joint, allowing for actions such as straightening the arm or leg. For example, the triceps muscle is an extensor that straightens the elbow joint when it contracts.
Muscles bend and flex by moving the arm to pick up an object or even weightlifting. you know lil Wayne
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.)
Flexor
This type of muscle contracts to bend a limb at a joint
A flexor is a muscle that causes a joint to bend. In contrast, an extension is a muscle that straightens a joint.
The primary function of the knee extension muscle is to straighten the leg by extending the knee joint.
Muscles are not jointed, though the bones they attach to may be. For example, your biceps muscle attaches to both your scapula (shoulder blade) and radius (one of the forearm bones). Contracting the muscle causes the elbow joint to bend.