Circulation System
How Does Exercise effect Heart Rate
It increases it
name an exercise that can work your arm muscles
answers vary
Why do humans need sleep?
To give the brain and body time to rest and repair
These nutrients give your body energy and are found in foods like bread, rice, and pasta
Carbohydrates
Name one of the molecules blood can carry
Answer Includes:
oxygen
carbon dioxide
nutrients (like glucose, proteins, fats)
hormones
Why is exercise good for you
•Makes your heart strong so it can pump blood better.
•Builds muscles and bones so you’re stronger and less likely to get hurt.
•Makes your body better at fighting off sickness.
The recommended number of hours most teens need to sleep each night.
9-11 hours
Which statement about energy is correct?
A) Your body gets energy only from carbohydrates during exercise
B) Your body uses energy from food to move your muscles
C) Exercise creates energy from nothing
D) Only fat provides energy for your muscles
B) Your body uses energy from food to move your muscles
Why does our heart rate need to speed up when we exercise
muscles require more oxygen to function during physical activity
Which type of exercise primarily strengthens your heart and lungs?
A) Lifting heavy weights for 10 minutes
B) Sprinting for 5 seconds
C) Jogging or swimming for 20–30 minutes
D) Stretching before class
C) Jogging or swimming for 20–30 minutes
Staying up late consistently weakens this system, which protects your body from illness.
Immune system
This nutrient provides stored energy, cushions organs, and helps your body absorb certain vitamins.
Fat