Muscles and joints Flashcards Preview

Ocr Biology > Muscles and joints > Flashcards

Flashcards in Muscles and joints Deck (10)
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1
Q

Where do you have fixed joints?

A

In The skull

2
Q

Name two places in your body where you have hinge joints?

A

Elbow

-Knee

3
Q

Name two places in your body where you have ball and socket joints?

A
  • Shoulder

- Hip joints

4
Q

Explain why tendons are not stretchy?

A

Tendons attach the muscle to bone therefore cannot let the muscle stretch to much during contraction.

5
Q

What are synovial joints?

A

Joints that are freely movable

6
Q

Describe the functions of :

Synovial memberane

A

it secretes synovial fluid.

7
Q

Describe the functions of Synovial fluid

A

It lubricates the joints.

8
Q

Describe the functions of Cartilage

A

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)

9
Q

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?

A

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.

10
Q

Give an example of a lever

A

When your arm bends and straightens it acts as a lever.