Storing Energy. Cells save energy produced by photosynthesis by transforming it into carbohydrates such as sugars and starches. Cellular Respiration. When cells need energy, they get it by breaking down these carbohydrates, releasing and using that stored energy. - PowerPoint PPT Presentation
Storing EnergyCells save energy produced by photosynthesis by transforming it into carbohydrates such as sugars and starches
Cellular RespirationWhen cells need energy, they get it by breaking down these carbohydrates, releasing and using that stored energy.Because all living things need energy continuously, cells carry out respiration continuously.This process uses oxygen.
During respiration, cells break down simple food molecules like glucose and release energy
The Respiration Equation:C6H12O6 + 6 O2 >>> 6 CO2 + 6 H2O + energy(glucose) (oxy.) (carb. Diox.) (water)
2 Stages of RespirationStage 1: takes place in the cytoplasm where glucose molecules are broken down into smaller molecules.
Stage 2: Occurs in the mitochondriaThere a chemical reaction using oxygen breaks down these molecules into even smaller molecules, producing energy.This also produces CO2 & H20
FermentationProvides energy for cells without using oxygenIt produces less energy than respirationAlcohol fermentation occurs in yeastLactic acid fermentation takes place in muscles.