Heart
When you exercise, what happens to your heartbeat?
A. It gets slower
B. It gets faster
C. It stops
D. It stays exactly the same
Answer: B (It gets faster)
What gas does your body breathe in that it needs during exercise?
A. Carbon dioxide
B. Oxygen
C. Sweat
D. Nutrients
Answer: B (Oxygen)
What do muscles help your body do?
A. Move
B. Breathe in oxygen
C. Pump blood
D. Produce carbon dioxide
Answer: A (Move)
Jordan is about to play a game that involves a lot of running. Which meal would give his body the best nutrients to help fuel his activity?
A. Chicken, brown rice, broccoli, and fruit
B. Candy and soda
C. Chips and a sugary drink
D. Nothing
Answer: A (Chicken, brown rice, broccoli, and fruit)
Why does your heart beat faster when you exercise?
A. Your working muscles need more oxygen and nutrients
B. Your body is trying to make you sweat
C. Your lungs stop working
D. Your muscles stop moving
Answer: A (Your working muscles need more oxygen and nutrients)
Why does your breathing become faster when you exercise?
A. Your body needs more oxygen
B. Your muscles stop needing energy
C. Your heart stops pumping blood
D. Your body is trying to make sweat
Answer: A (Your body needs more oxygen)
When you exercise, your muscles contract and relax. Why?
A. To create movement
B. To make your lungs work
C. To produce sweat
D. To slow down your heart
Answer: A (To create movement)
You’re playing outside and running around for a long time. Your body starts getting warmer. What does drinking water help your body do?
A. Make your heart beat slower
B. Give your muscles protein
C. Stay hydrated and help control its temperature
D. Bring oxygen into your lungs
Answer: C (Stay hydrated and help control its temperature)
You start running after sitting still. Your heart begins beating faster. What is your heart helping your body do?
A. Move more oxygen and nutrients to your working muscles
B. Make your lungs produce carbon dioxide
C. Make your muscles relax
D. Lower your body temperature
Answer: A (Move more oxygen and nutrients to your working muscles)
You finish running and notice that you are breathing faster than when you were sitting. What does this tell you?
A. Your lungs are working harder to bring oxygen into your body
B. Your lungs have stopped working
C. Your body no longer needs oxygen
D. Your muscles are producing oxygen
Answer: A (Your lungs are working harder to bring oxygen into your body)
You have been exercising for several minutes and start sweating. Why is your body producing sweat?
A. To give your muscles more energy
B. To help cool your body and regulate its temperature
C. To bring oxygen into your lungs
D. To make your heart beat faster
Answer: B (To help cool your body and regulate its temperature)
After you exercise, why is eating protein-rich food helpful for your body?
A. It makes your body produce sweat
B. It helps your lungs breathe faster
C. It makes your heart stop beating faster
D. It helps your body build and repair muscles
Answer: D (It helps your body build and repair muscles)