What type of reaction takes place in lungs ?
a) How do we get energy to stay alive ? B) Is any reaction involved in that ? C) If any, write the chemical equation to that.
d) What type of reaction it is ?

Explanation

1) We need energy to stay alive.
2) If we take food, it changes into glucose by digetive system.
3) The glucose combusts and releases energy in the lungs.
4) By the respiration oxygen is taken in and it is combine with glucose which is in blood.
5) The chemical reaction is `C_(6)H_(12)O_(6)+6O_(2) rarr 6CO_(2)+6H_(2)O+O" (energy)"`
6) Oxygen is taken in and `CO_(2)` is released is called respiration.
7) So, respiration is a combustion reaction.
8) In this reaction energy is also released, hence it is an exothermic reaction.