If you mean the knee joint it is flexion and extension in any running movement.
No it is a synovial joint! There is some degree of free movement possible
A synovial joint contains a fluid-filled joint cavity enclosed by an articular capsule. Some of them are enforced by ligaments. Synovial joints are freely movable and examples include the elbow joint and wrist joint.
This joint allows movement in many planes.
That is the bursa in your synovial joint. Bursa lines with the synovial membrane and contains synovial fluid that is used to lubricate the joint when there's movement.
Joint fluid analysis, also called synovial fluid analysis
or Diarthrosis : articulation taht permits free movement or a freely movable joint also called synovial joint.
Elevation
No. An amphiarthrodial joint is a cartilaginous joint that allows minimal movement in a lot of different planes. The ball-in-socket joint is a triaxial synovial joint that allows movement in all three planes around all three axis.
Synovial Joints
Synovial joints allow for movement between the articulating bones (in this case the sternum and the clavicle). The articulating bones are covered in articular cartilage, which are connected with ligaments and lined with a synovial membrane. There is a fluid-filled sac between these types of joints to reduce the amount of friction with movement and the fluid inside of these sacs is called synovial fluid.
Because movement would damage the delicate blood vessels.
The ball-and-socket joint allows the greatest amount of movement, like the shoulder or hip.