Type of Respiration Description Oxygen Requirement End Products Examples
Aerobic Respiration Most efficient form of respiration. Requires Oxygen Carbon dioxide and water Human cells, most organisms
Anaerobic Respiration Occurs in the absence or limited supply of oxygen. No Oxygen Required Various end products depending on the pathway (e.g., lactic acid or ethanol) Yeast, bacteria, muscle cells
Lactic Acid Fermentation Anaerobic process producing lactic acid. No Oxygen Required Lactic acid Muscle cells during intense exercise, some bacteria
Alcoholic Fermentation Anaerobic process producing ethanol and CO2. No Oxygen Required Ethanol and carbon dioxide Yeast (used in brewing and baking), some bacteria
Krebs Cycle (Citric Acid Cycle) Part of aerobic respiration. Requires Oxygen Carbon dioxide, ATP, NADH, FADH2 Mitochondria of eukaryotic cells


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