https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:energy-and-matter-in-biological-systems/x230b3ff252126bb6:cellular-respiration/v/cellular-respiration 2022-09-24T04:45:13.131282509Z Cellular respiration Cellular respiration is a chemical process in which the bonds of food molecules and oxygen molecules are broken and new compounds are formed that can transport energy to muscles. Cellular respiration also releases the energy needed to maintain body temperature despite ongoing energy transfer to the surrounding environment. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/4c7cabca-832a-4de0-ba89-0191870e74fc_1280_720_base.png Cellular respiration Cellular respiration is a chemical process in which the bonds of food molecules and oxygen molecules are broken and new compounds are formed that can transport energy to muscles. Cellular respiration also releases the energy needed to maintain body temperature despite ongoing energy transfer to the surrounding environment. https://cdn.kastatic.org/ka-youtube-converted/NUFbQUOLAXc.mp4/NUFbQUOLAXc.mp4 460 Metabolism-respiration https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:energy-and-matter-in-biological-systems/x230b3ff252126bb6:cellular-respiration/a/cellular-respiration-overview 2024-05-09T17:42:08.599818576Z An introduction to cellular respiration Learn how organisms use cellular respiration to release energy stored in food. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:energy-and-matter-in-biological-systems/x230b3ff252126bb6:cellular-respiration/a/anaerobic-respiration-and-fermentation 2024-05-09T17:42:08.599818576Z Anaerobic respiration and fermentation Learn how organisms use anaerobic respiration and fermentation to release energy in food without the use of oxygen. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:energy-and-matter-in-biological-systems/x230b3ff252126bb6:cellular-respiration/e/understand-cellular-respiration-overview 2026-04-08T01:15:04.085520103Z Understand: cellular respiration Check your understanding of cellular respiration in this set of free, standards-aligned practice questions. Wieteke Holthuijzen exercise https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:energy-and-matter-in-biological-systems/x230b3ff252126bb6:cellular-respiration/e/apply-cellular-respiration 2026-03-18T10:10:31.931963487Z Apply: cellular respiration and fermentation Apply your understanding of cellular respiration, anaerobic respiration, and fermentation in this set of free, standards-aligned practice questions. Wieteke Holthuijzen exercise https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/glycolysis/v/glycolysis 2023-08-14T21:12:46.061619254Z Overview of glycolysis Let's explore the process of glycolysis, the first phase of cellular respiration. Learn how this process breaks down glucose into two 3-carbon compounds, using two ATPs in the investment phase and generating a net of two ATPs in the payoff phase. Sal Khan video https://cdn.kastatic.org/googleusercontent/OD7aq1StdGcG_C9H_VqyQkHdrcMf2tHaQePr5hDNhvjUsZ1ayAYb7KngDNZTHwdOgZ33UFsToyYLgLaTfxDKYmA Overview of glycolysis Let's explore the process of glycolysis, the first phase of cellular respiration. Learn how this process breaks down glucose into two 3-carbon compounds, using two ATPs in the investment phase and generating a net of two ATPs in the payoff phase. https://cdn.kastatic.org/ka-youtube-converted/FE2jfTXAJHg.mp4/FE2jfTXAJHg.mp4 810 Metabolism-respiration https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/glycolysis/v/glycolysis-overview 2021-03-18T10:33:23Z Steps of glycolysis Introduction to glycolysis. Role of glycolysis in producing ATPs and NADHs and converting glucose to pyruvates. video https://cdn.kastatic.org/googleusercontent/osGwKeChAgCGcXXa6hzafxfCoP3msh0eU5Irb-ciaklXubWxh56XByEIbQ6bIic6Ruu7IT9RIjtfd55w2i794A Steps of glycolysis Introduction to glycolysis. Role of glycolysis in producing ATPs and NADHs and converting glucose to pyruvates. https://cdn.kastatic.org/ka-youtube-converted/ArmlWtDnuys.mp4/ArmlWtDnuys.mp4 722 Metabolism-respiration https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/glycolysis/a/glycolysis 2023-09-14T11:22:40.102153098Z Glycolysis Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. Glycolysis consists of an energy-requiring phase followed by an energy-releasing phase.  article https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/pyruvate-oxidation-and-the-citric-acid-cycle/v/krebs-citric-acid-cycle 2021-03-18T10:33:24Z Krebs / citric acid cycle Overview of the Krebs or citric acid cycle, which is a series of reactions that takes in acetyl CoA and  produces carbon dioxide, NADH, FADH2, and ATP or GTP.  Sal Khan video https://cdn.kastatic.org/googleusercontent/0KB0Agd6F4H0ZOH41kJ3KQZiTMNfo9KjBuT5jS0fhOSEMWPWjB9gOjtk_F-2D92IYvjrRI7RwyejjMdEinBRhjkJ Krebs / citric acid cycle Overview of the Krebs or citric acid cycle, which is a series of reactions that takes in acetyl CoA and  produces carbon dioxide, NADH, FADH2, and ATP or GTP.  https://cdn.kastatic.org/ka-youtube-converted/juM2ROSLWfw.mp4/juM2ROSLWfw.mp4 1067 Metabolism-respiration https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/pyruvate-oxidation-and-the-citric-acid-cycle/a/the-citric-acid-cycle 2023-06-22T09:32:02.370557018Z The citric acid cycle Overview and steps of the citric acid cycle, also known as the Krebs cycle or tricarboxylic acid (TCA) cycle. article