4. Some problems with the digestive system make it very difficult for the body to digest enough food.
Why would it be harder to exercise when you have a digestion problem like this?
a) You would not be able to sleep, which would make you too tired to exercise.
b
Your cells would have molecules from air, but would not get enough molecules from food.
You would need to breathe in a lot more air because your body would have fewer molecules
from food.
d) You would not get any of the molecules your cells need to exercise.