EVERYDAY SCIENCE

Detailed explanation-1: -In the reactions of an animal’s metabolism, much of the energy stored in fuel molecules is released as heat. This is not necessarily a bad thing! Some animals can use (and regulate) their metabolic heat production to maintain a relatively constant body temperature.

Detailed explanation-2: -ATP is produced and carbon dioxide is released.

Detailed explanation-3: -Mammals generate heat mainly by keeping their metabolic rate high. The cells of mammals have many more mitochondria than the cells of other animals. The extra mitochondria generate enough energy to keep the rate of metabolism high. Mammals can also generate little bursts of heat by shivering.

Detailed explanation-4: -Heat or thermal energy Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.

Detailed explanation-5: -While much of the energy derived by cellular respiration eventually ends up as heat and is released into the environment, some of it is used to build molecules such as DNA or proteins in the body.