1.   Bones need __________ to move them into different positions.

2.   Is the heart and stomach muscles?

3.  Muscles pull on bones by ____________ ( contracting/relaxing).

4.  What are tendons?

5.  What is the difference between tendons and ligaments?

6.  Explain how the biceps and triceps help our arms to move.

7.  Differentiate between voluntary and involuntary muscles.

8.  What causes the following:

a. sprains

b. arthritis

c. tennis elbow

d. torn hamstrings

9.  Why is it important to warm up before  a sporting activity?

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