Why Muscle Matters — Quiz

Multiple-Choice Questions

1. What is the definition of exercise given in this lesson?
A. Any activity that raises your heart rate
B. Movement of the body that uses energy that is planned, structured, repetitive, and purposive
C. A sport played with a team
D. Any activity done at the gym

2. Approximately how many muscles are there in the human body?
A. Over 100
B. Over 300
C. Over 600
D. Over 1,000

3. Which muscle works independently of your mind, without you having to think about it?
A. Biceps
B. Quadriceps
C. Heart
D. Trapezius

4. Which exercise is used to strengthen the quadriceps?
A. Shrugs
B. Squats
C. Curls
D. Calf raises

5. What is muscular strength?
A. How many times you can repeat an exercise without tiring
B. How much force you can exert or how much weight you can lift
C. The ability to do daily tasks without getting tired
D. The speed at which you can move

6. What is muscular endurance?
A. How much weight you can lift one time
B. How many times or how long you can exert force without getting too tired
C. The size of a muscle
D. The flexibility of a muscle

7. According to the guidelines, muscle-strengthening/bone-strengthening activity should be included how often as part of daily physical activity?
A. Every day
B. At least 3 days a week
C. Once a week
D. Only during PE class

8. What is circuit training, as defined in this lesson?
A. Running around a track multiple times
B. A resistance training set followed immediately by an aerobic exercise interval
C. Lifting the heaviest weight possible one time
D. A stretching routine done before exercise

Short-Answer Questions

9. List at least three benefits of building muscle mentioned in the lesson (for example, related to bones, heart/lungs, or insulin sensitivity).

10. Explain how muscular strength and muscular endurance complement each other, using the eraser activity example from the lesson.

11. Explain why doing push-ups with hands placed differently (wider vs. shoulder-width) is beneficial, according to the lesson.

---

Answer Key

1. B
2. C
3. C
4. B
5. B
6. B
7. B
8. B

9. Any three of: helps you grow stronger and move more efficiently; helps strengthen your bones; decreases risk for injury; improves the health of your heart and lungs; promotes insulin sensitivity; helps with weight management and protects against obesity; reduces anxiety/depression symptoms.

10. Muscular strength is needed to hold the eraser and push it against the board, while muscular endurance is needed to keep moving the eraser back and forth for two minutes. You have to be strong enough to hold the eraser and have the endurance to keep erasing — without strength, you can't have endurance, and both are needed to accomplish many tasks.

11. Doing push-ups with hands closer together works the chest and triceps harder (though it's more difficult and can stress the elbows), while doing them with hands wider apart also uses the chest and triceps but places more emphasis on the outer chest. Doing both types helps keep muscle growth in the upper body balanced.