Flexor
The joint between the humerus and the ulna bends the elbow.
The quadriceps muscle helps straighten and extend the leg and the hamstring helps bend the knee.
bicept
They're referring to opposite motions, if a muscle bends a joint - it's antagonist straightens it out.
extensor
By tensing.
Spine. Bone, not muscle.
This type of muscle contracts to bend a limb at a joint
A flexor muscle.
The type of nerve that goes from the spinal cord to the muscle which bends the forearm is name the 'triceps branchii muscle'. This is a fairly large muscle on the back of the upper limb of one of many vertebrates. Hope this is useful! Dr. Lav
gliding joint