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What’s Your Balance? eLearning Kit©
Virtual Body Explorer
Muscles Answer Key
Page 1
Muscles
Directions: Decide whether each statement below is true or false. If the statement is false, write a
sentence to correct the statement so that it is true.
1. Cardiorespiratory endurance is the ability of the muscles to perform without easily tiring during
physical activity.
False. Muscular endurance is the ability of the muscles to perform without easily tiring during
physical activity. Cardiorespiratory endurance is the ability of both the circulatory and respiratory
systems to supply oxygen during sustained physical activity.
2. The hamstrings (thighs) are the largest muscles in the body.
False. The largest muscle in the body is the one you sit on, the Gluteus Maximus.
3. The muscles in our body only help us to walk, lift, push and move.
False. Muscles also help with internal body functions such as heart rate, food digestion, and blood
circulation.
4. There are four types of muscles in the body – smooth, digestive, cardiac, and skeletal.
False. There is not a digestive muscle group; however organ walls in the digestive system are made
up of smooth muscle.
5. Smooth muscles are found behind the eyes.
True. Smooth muscles are also found in various organ walls such as the stomach, bladder, and GI
tract.
6. The heart consists of cardiac muscle that works to pump blood throughout the body.
True. Cardiac muscle in the heart pumps blood throughout the body 24/7.
7. Tendons are tough connective tissue that attaches bones to smooth muscle.
False. Tendons connect skeletal (“striated”) muscles to bones, allowing muscles to contract.
8. An inactive lifestyle can cause the muscles to weaken.
True. If muscles aren’t used they become weak, inefficient, and easily damaged.
What’s Your Balance? eLearning Kit©
Virtual Body Explorer
Muscles Answer Key
Page 2
9. To build endurance, you should start by exercising as hard as you can, and then slow down as you
go.
False. To build endurance, you should start by exercising slowly and increasing intensity over time.
You could injure yourself by not starting slowly to warm up the body and get it ready to be active.
10. Muscular endurance refers to the amount of force your muscles can exert.
False. Muscular endurance is the ability of the muscles to perform without easily tiring during
physical activity. Muscular strength is the ability of the muscle to exert force during an activity.
11. It is possible to control all of the muscles in our body.
False. Cardiac and smooth muscles are not under conscious control. Cardiac, or heart muscle,
pumps blood through the body while smooth muscle makes up various organ walls.
12. Foods high in protein help maintain healthy muscles.
True. Protein in the body helps to maintain muscles, bones, blood, and other organs.
13. It would be impossible to talk or blink your eyes without muscles.
True. Talking and blinking your eyes are two less obvious activities that require the use of muscles.
14. We can see and feel smooth muscles.
False. Smooth muscles make up various organ walls. Skeletal (“striated”) muscles are the muscles
that we can see and feel.
15. The body has more than 600 muscles.
True. The more than 600 muscles in the body help us to do almost everything, from pumping blood
throughout the body to lifting a fork to eat.
16. An inactive lifestyle will eventually lead to increased muscle strength and endurance.
False. Engage in daily physical activity, including strength training, to increase muscular strength
and endurance.
17. Sources of protein in the diet include dairy products, beans, meat, fish, eggs, and nuts.
True. Protein in the diet works to maintain various tissues in the body, including muscle.