A muscle that straightens a joint is called an extensor.
Flexor muscles will decrease the angle of the joint that they cross. Examples are biceps brachii (that bend your elbow) or the posterior thigh muscles, semitendinosus, semimembranosus and biceps femoris (also known as the hamstrings; that bend your knee).
The muscles that cause joints to straighten are called extensor muscles. These muscles include the muscles located at the knees and elbow that help to straighten these body parts. Flexor muscles help joints bend or contract joints.
Extension means straightening a joint.
Generally straightening a joint is to extend it.
For examples, if you hold you arm out straight, then bend it at the elbow, you have "flexed" the joint. Now when you return it to it's straight position, you have extended the joint.
The muscle is called the extensors. This is from a veterinary book so it is reliable Veterinary medical Terminology
An extensor is a muscle that straightens a joint. The opposite, a flexor, is a muscle that bends a joint.
Muscles that straighten the joints are extensors. Muscles the bend the joints are flexors.
extensor
A flexor is a muscle that causes a joint to bend. In contrast, an extension is a muscle that straightens a joint.
To extend a muscle A MOTION IS MADE TO INCREASE AN ANGLE BETWEEN TWO BONES.
extends leg; straightens knee joint
An extensor straightens part of your body.
They're referring to opposite motions, if a muscle bends a joint - it's antagonist straightens it out.
a big one
Extender
Extensor
Muscles can only exert force by getting shorter. Muscles work in pairs by one muscle pulling in one direction, the other muscle pulls in the opposite direction. One bends your leg, the other straightens the leg, etc.
The pivot joint only "folds & straightens" whereas a ball and socket can move in any direction AND twist.
a muscle which crosses a single joint refers to a single joint muscle.