These words are very important to know when studying metabolism. Metabolism manages the energy resources of the cell. With the help catabolic pathways the process of cellular respiration in plants can occur in order to attain food for its survival. Without plants, many autotrophic organisms will become extinct to the point were there existence may no longer be seen here on earth. Bioenergetics study how these organism use their energy resources wisely. The first law of thermodynamics help us understand that energy in the universe is constant, it can not be created nor destroyed. For example, a cheetah obtains its chemical energy by eating its prey and this energy is converted into kinetic energy as the cheetah uses it to sprint across the grassy plains. Metabolism plays a major role in the lives of living organisms. It helps us adapt to new eating habits and if you go without food for a period of time it will adjust accordingly and slow down on its own.
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