CELLULAR RESPIRATION

CELLULAR RESPIRATION

1. Cellular Respiration – when cells break down simple food molecules such as glucose and release the energy they contain.

A molecule of glucose

CELLULAR RESPIRATION

2. Respiration Equation –

C6H12O6 + 6O2 6CO2 + 6H2O + Energy

REACTANTS PRODUCTS

Yields

CELLULAR RESPIRATION3. Two Stages:

1) Stage 1 – Glucose molecules are broken down into smaller molecules in cytoplasm

CELLULAR RESPIRATION

2) Stage 2 – small molecules are broken down even smaller; requires oxygen; a lot of energy is released (in mitochondria)

CELLULAR RESPIRATION

4. Reactants of Respiration – Glucose and Oxygen

CELLULAR RESPIRATION

5. Products of Respiration – Carbon Dioxide and Water (they diffuse out of cell) and Energy

ENERGY!

CELLULAR RESPIRATION

6. Photosynthesis vs. Respiration – Opposite cycles; together they form a cycle that keeps the levels of oxygen and carbon dioxide constant

CELLULAR RESPIRATION

7. Fermentation – An energy releasing process (like respiration) that does NOT require oxygen (there are 2 types)

CELLULAR RESPIRATION

1) Alcoholic – fermentation that occurs in yeast and single-celled bacteria; produces alcohols, carbon dioxide, and energy

CELLULAR RESPIRATION

2) Lactic Acid – fermentation that occurs when cells lack oxygen; a build up of lactic acid makes muscles feel weak