Question

multiple-choice questions

1. 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.
c 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.

Explanation:

When there are digestive system problems that make it hard to digest enough food, the body can't break down food properly to get the necessary molecules (like glucose from carbohydrates). Cells need molecules from food (along with oxygen from air) for cellular respiration (e.g., aerobic respiration: \(C_6H_{12}O_6+6O_2
ightarrow6CO_2 + 6H_2O+\text{energy}\)) to produce energy (ATP) for activities like exercise. Option a is about sleep - no direct link to digestion - exercise relation. Option c: breathing more air doesn't compensate for lack of food - derived molecules. Option d is too extreme as the body might still get some molecules, just not enough. Option b is correct as cells need both air - derived (oxygen) and food - derived (e.g., glucose) molecules for energy - producing processes related to exercise.

Answer:

B. Your cells would have molecules from air, but would not get enough molecules from food.