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https://www.youtube.com/watch?v=2f7YwCtHcgk

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Introduction to cellular respiration | Cellular respiration | Biology | Khan Academy

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Glycolysis - The first stage of cellular respiration in which glucose is broken down to make two molecules of pyruvic acid, two molecules of ATP, two molecules of NADH, and two water molecules.

Krebs Cycle - Second stage of cellular respiration in which pyruvate is consumed and produces CO2, ATP, FADH, and NADH.

Electron Transport Chain - Last stage of cellular respiration, which is a series of protein complexes and other molecules that transfer electrons from electron donors to electron acceptors.

Pyruvic Acid - Made when Glycolysis splits a sugar molecule to make two molecules of pyruvic acid.

Aerobic - Process that requires oxygen.

Anaerobic - Process that does NOT require oxygen.

Fermentation - A process by which energy can be released from food molecules in the ABSENCE of oxygen.

Citric Acid - Used in Krebs Cycle and is made when pyruvic acid enters the matrix then gets NAD+ and accepts two electrons for NADH and the remaining two carbon molecules form acetyl-CoA then combines with four carbon molecules to make citric acid.

Cellular Respiration - Process that releases energy from food in the PRESENCE of oxygen.

Calorie (Kilocalorie) - Equivalent to 1,000 calories.

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1. How do organisms get energy in the absence of oxygen? They go through glycolysis and/or fermentation.

2. What types of organisms go through cellular respiration? All and only eukaryotic organisms.

3. What is the equation for cellular respiration in symbols? C6H12O6 + 6O2 --> 6CO2 + 6H2O + 36 ATP.

4. How many ATP does the process of cellular respiration produce from one molecule of glucose on average? 36 ATP per glucose molecule.

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- The products of photosynthesis are the reactants of cellular respiration.

- There are two types of fermentation: lactic acid and alcoholic.

- Order of events in cellular respiration: Glycolysis --> Krebs Cycle --> Electron Transport Chain.

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The main function of cellular respiration is to synthesize energy, which is essential to eukaryotic cells. Cellular respiration gives us the energy to do everyday-life tasks and take part in exercises. Cellular respiration is just one "key" component that keeps life flowing on Earth.