Which step in the respiratory process of mammals requires the most energy?
Question: Which step in the respiratory process of mammals requires the most energy?
The respiratory process in mammals involves the exchange of gases between the body and the environment. The process can be divided into two stages: external respiration and internal respiration. External respiration involves the exchange of gases between the lungs and the environment, while internal respiration involves the exchange of gases between the blood and the body's tissues¹.
The step in the respiratory process of mammals that requires the most energy is cellular respiration, particularly the electron transport chain (ETC) within the mitochondria. Cellular respiration is a metabolic process that occurs in all living cells, including mammalian cells. It involves the breakdown of glucose to produce energy in the form of ATP (adenosine triphosphate) molecules³. The ETC is a series of protein complexes located in the inner mitochondrial membrane that plays a crucial role in ATP production.
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