Question

1. a patient has been eating healthy foods, but her respiratory system is not working as well as it usually does. can this patient still exercise normally?

yes, her body can get everything it needs for energy from molecules in food.

no, her respiratory system does not have enough oxygen to combine together to release energy.

no, her cells do not have enough oxygen to react with glucose and release energy.

no, her cells do not have enough oxygen to react with proteins to release energy.

Explanation:

Cellular respiration is the process by which cells produce energy. In aerobic respiration (the most efficient form), glucose reacts with oxygen ($\ce{C6H12O6 + 6O2
ightarrow6CO2 + 6H2O+energy}$). If the respiratory system is not working well, less oxygen is available for cells. Energy production is compromised as oxygen is a key reactant in the breakdown of glucose (not proteins - proteins are mainly for building and repairing tissues, not the main fuel for normal exercise - related energy release in this context).

Answer:

C. No, her cells do not have enough oxygen to react with glucose and release energy.