https://www.khanacademy.org/science/ap-biology/cellular-energetics/cellular-respiration-ap/v/overview-of-cellular-respiration 2023-06-06T10:35:22.92767095Z Overview of cellular respiration Cellular respiration is how cells get energy from glucose. The process has three main parts: Glycolysis happens in the cytosol and breaks glucose into two pyruvate, producing 2 ATPs and 2 NADHs. The Krebs cycle occurs in the mitochondrial matrix, where pyruvate is turned into acetyl-CoA, which then goes through a series of reactions, producing ATP, NADH, and FADH2. Finally, oxidative phosphorylation uses NADH and FADH2 to create a proton gradient, which helps make more ATP. video https://cdn.kastatic.org/googleusercontent/Ml9Go_y5yN9tR6xTkhsCx4bj-GyM_NqD3a9m474HusoNa1pvmlbWVQXfK4BxtzvRALulCNxWZPW2q3cYL4LUvFY Overview of cellular respiration Cellular respiration is how cells get energy from glucose. The process has three main parts: Glycolysis happens in the cytosol and breaks glucose into two pyruvate, producing 2 ATPs and 2 NADHs. The Krebs cycle occurs in the mitochondrial matrix, where pyruvate is turned into acetyl-CoA, which then goes through a series of reactions, producing ATP, NADH, and FADH2. Finally, oxidative phosphorylation uses NADH and FADH2 to create a proton gradient, which helps make more ATP. https://cdn.kastatic.org/ka-youtube-converted/9zoS5WGsmpc.mp4/9zoS5WGsmpc.mp4 791 Cellular respiration and energy conversion anaerobic respiration https://www.khanacademy.org/science/ap-biology/cellular-energetics/cellular-respiration-ap/e/cellular-respiration-exercise 2023-08-07T17:09:37.131449861Z Cellular respiration Test your knowledge of cellular respiration! Haider Ali Bhatti exercise https://www.khanacademy.org/science/ap-biology/cellular-energetics/cellular-respiration-ap/a/intro-to-cellular-respiration-and-redox 2023-08-07T17:09:37.131449861Z Introduction to cellular respiration and redox Intro to redox in cellular respiration. Substrate-level vs. oxidative phosphorylation. Electron carriers. article https://www.khanacademy.org/science/grade-11-biology-snc-aligned/x58c107ba92d3f0b2:domain-f-metabolism/x58c107ba92d3f0b2:cellular-respiration-and-energy-conversion-anaerobic-respiration/e/understand-cellular-respiration 2026-04-02T04:15:35.616513959Z Understand: cellular respiration Check your understanding of cellular respiration in this set of free practice questions aligned to NGSS standards. exercise 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/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 Cellular respiration and energy conversion anaerobic respiration 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/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/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 Cellular respiration and energy conversion anaerobic 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 Cellular respiration and energy conversion anaerobic respiration https://www.khanacademy.org/science/ap-biology/cellular-energetics/cellular-respiration-ap/a/fermentation-and-anaerobic-respiration 2025-11-12T15:50:39.509225734Z Fermentation and anaerobic respiration How cells extract energy from glucose without oxygen. In yeast, the anaerobic reactions make alcohol, while in your muscles, they make lactic acid. article 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