How Respiration and Digestion Are Exothermic Processes?

Respiration and digestion are exothermic processes because they release energy in the form of heat. Both processes involve the breakdown of complex molecules, leading to the release of energy.

Respiration is the process through which cells break down glucose and other nutrients to release energy in the form of adenosine triphosphate (ATP). This energy is used for various cellular activities. During respiration, glucose reacts with oxygen to produce carbon dioxide, water, and energy. The reaction is exothermic because energy is released during the breakdown of glucose. This energy is typically in the form of heat, which is why we feel warmer during exercise or physical activity.

Similarly, digestion is an exothermic process. When food enters the digestive system, enzymes break down complex carbohydrates, proteins, and fats into simpler molecules like glucose and amino acids. As these bonds break, energy is released. This energy is used for metabolic processes. The exothermic nature of digestion can be observed when our body temperature increases slightly after eating a meal.