Understanding the Muscular System

How many muscles work together to move your foot when you take a step?

• 200 muscles

• 300 muscles

• 400 muscles

• 100 muscles

What type of muscle is found only in the heart?

• Smooth muscle

• Cardiac muscle

• Bicep muscle

• Skeletal muscle

Which type of muscle fibers are known for their endurance?

• Slow-twitch fibers

• Smooth fibers

• Fast-twitch fibers

• Cardiac fibers

What system controls the cardiac and smooth muscles?

• Somatic nervous system

• Peripheral nervous system

• Central nervous system

• Autonomic nervous system

Approximately what percentage of your warmth is provided by muscle?

• 75%

• 65%

• 85%

• 55%