Cellular respiration

Metabolism

• chemical reaction that occurs within the cells to produce energy

• the reactions occur in different places of the cell

• requires different enzymes

• cells prefer glucose but can use other nutrients

Glucose + oxygen → carbon dioxide + water + ENERGY (33% ATP 66% heat)

• anaerobic and aerobic respiration

Adenosine Triphosphate (ATP)

• a storage molecule for energy so it can be transported to places in the cell that need to to work

Anaerobic

• 2 processes

  1. Glycolysis

     • no oxygen needed

     • occurs in cytoplasm

     • start with one glycolysis

     • end up with 2 pyruvate molecules

     • creates 2x ATPs

  2. Fermentation

     • weather or not oxygen is available

     • starts with 2 pyruvate molecules

     • ends with 2 lactic acid molecules

     • eg. sprinting

     • make oxygen quick

     • incur oxygen debt

     • O2 can be derived into liver

Aerobic

• oxygen required

  1. Krebs cycle in the matrix

     • starts with 2 pyruvate molecules

     • requires oxygen

     • releases 2 ATPs

  2. Electron Transport system

     • substances move from the cristae

     • a series of reactions occur that moves electrons from molecule to molecule to produce

       • 34 ATP molecules

       • 6 CO

       • 6 H2O

     • complete breakdown = 1 glucose results in 2 + 2 + 34 = 38 ATPs

Uses of ATP

• synthesis molecules ex. building proteins

• cell division and growth

• moving organelles or the cell

• transport ex. vescular transport