The Muscular System Content Practice A LESSON 2 1.

Name
Date
Class
Content Practice A
LESSON 2
The Muscular System
Directions: Circle the term in parentheses that correctly completes each sentence.
1. Muscles do their work by (contracting/expanding).
2. Muscles that are attached to bones give us movement and (stability/energy).
3. The longest muscle in the body extends from the knee to the (shoulder/hip).
4. Shivering is a way in which the muscles maintain the body’s
(chemical balance/internal temperature).
5. The three types of muscles are skeletal, smooth, and (cardiac/abdominal).
6. Skeletal muscles are also called (voluntary/involuntary) muscles.
7. Smooth muscles are smoother and (longer/shorter) than skeletal muscles.
(pumping action/cell replacement).
9. The energy that muscles need to function comes from (food/sunlight).
10. Without exercise, muscles get smaller and (flatter/weaker).
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Structure and Movement
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8. The discs at the ends of heart muscle cells coordinate the heart’s