AP BIOLOGY

Detailed explanation-1: -Respiration is a kind of burning fuel. During respiration, Carbohydrates present in food are broken down to form glucose. Glucose combines with oxygen in the cells of our body and provides energy. Therefore, respiration is an exothermic reaction.

Detailed explanation-2: -Respiration is a series of exothermic reactions that occur in the mitochondria of living cells in order to release energy from food molecules.

Detailed explanation-3: -During respiration, the simpler compounds obtained during digestion are burned to get energy required for various processes. So, respiration is an exothermic reaction since energy is getting released.

Detailed explanation-4: -There is a slight increase in temperature during the respiration. Every living cell breaks down its food to release energy. Reactions that involve liberation of energy and increase in temperature are called exothermic reactions. Thus, respiration is exothermic in nature.