[Sophomore Biology at GHS: Cells and Energy]

Cellular Respiration


Cellular Respiration: is the process that releases energy by breaking down food molecules in the presence of oxygen.

Cellular Respiration = Aerobic Respiration

Aerobic respiration occurs in the mitochondria.

Some of the energy released by breaking food down is stored as ATP, while some is released as heat.

ATP is a short-term energy storage molecule all cells use as their energy source.

The Equation for Cellular Respiration is:


Reactants of Cellular Respiration:

Glucose (C6H12O6) & Oxygen (O2)

Products of Cellular Respiration:

Carbon Dioxide (CO2) & Water (H2O) & ATP & Heat

Anaerobic Respiration: (Fermentation) Respiration that occurs in the absence of oxygen to still make some ATP to keep cells alive.


2 Kinds of Anaerobic Respiration:

a) Lactic Acid Fermentation - (Occurs in muscle cells for short periods of time!) Breaks sugar down to Lactic acid + 2ATP.

b) Alcohol Fermentation - (Occurs in yeast & some bacteria) Breaks sugar down to Alcohol + CO2 + 2ATP.