Where do you have fixed joints?
In The skull
Name two places in your body where you have hinge joints?
Elbow
-Knee
Name two places in your body where you have ball and socket joints?
- Shoulder
- Hip joints
Explain why tendons are not stretchy?
Tendons attach the muscle to bone therefore cannot let the muscle stretch to much during contraction.
What are synovial joints?
Joints that are freely movable
Describe the functions of :
Synovial memberane
it secretes synovial fluid.
Describe the functions of Synovial fluid
It lubricates the joints.
Describe the functions of Cartilage
it is Smooth and slippery to reduce friction between bones and also used during the growth of a child as it is ossified (turning it into bone)
When you lift a heavy book, your biceps muscle exerts more force than the weight of the book.However,it enables you to lift the book through a large distance. Explain how it does this?
The elbow is the pivot point. The hand moves through a larger distance than the muscles. The muscles exert a larger force than the load that the hands lift.
Give an example of a lever
When your arm bends and straightens it acts as a lever.