Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
How do cells obtain energy for their functioning?
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Step 1
Cells perform the metabolic functions through various chemical reactions. The combination of the chemical reactions that takes place within the cell is defines the cell’s metabolism. Catabolism involves the breaking down of complex chemicals into simple molecules whereas anabolism involves the building of complex molecules from simple molecules and definitely requires energy. There are various metabolic pathways through which cells derive the energy for their functioning like glycolysis, Krebs’ cycle, oxidative phosphorylation, fermentation etc.
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