Q.1
Exercise makes muscles do what?
  • Grow bigger and stronger
  • Grow smaller and weaker
  • Become less stretchy
  • Become less effective
Q.2
How do voluntary muscles always work?
  • Voluntary muscles always work on their own
  • Voluntary muscles always work in pairs
  • Voluntary muscles always work in groups of three
  • Voluntary muscles always contract at the same time
Q.3
Your facial muscles allow you to do what?
  • To use your brain
  • To make different facial expressions
  • To hear
  • To lift heavy weights
Q.4
Which of these is an involuntary muscle?
  • The heart
  • The diaphragm
  • The muscles lining the stomach
  • The tongue
Q.5
When you contract your bicep, what happens?
  • Your tricep relaxes
  • Your other bicep also contracts
  • Your arm lowers
  • Nothing else happens
Q.6
Skeletal muscles are usually attached to bones at both ends. Which muscle is an exception?
  • The tongue
  • The gluteus maximus
  • Pectorals
  • Triceps
Q.7
What attaches muscles to the skeleton?
  • Ligaments
  • Joints
  • Tendons
  • Arteries
Q.8
What are muscles made from?
  • Fat cells
  • Thin strands of iron
  • Thousands of small stretchy fibers
  • Carbohydrates
Q.9
Which of these is true?
  • Snakes have very strong muscles to help them move
  • Some insects have thousands of muscles
  • Humans are the only animals with muscles
  • Birds need powerful muscles in order to fly
Q.10
What do your muscles need in order to work?
  • Carbon dioxide and energy
  • Oxygen and food
  • Nitrogen and energy
  • Carbon dioxide and blood
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