Respiration Important Points

Equations for Aerobic and Anaerobic Respiration

Aerobic:

glucose carbon dioxide + water + ENERGY

C6H12O6 + 6O2 6CO2 + 6H2O + ATP

Anaerobic:

glucose lactic acid + ENERGY

C6H12O6 2 C3H6O3 + ATP

Differences between Aerobic and Anaerobic Respiration

AerobicAnaerobic

Requires O2Does not require O2

No lactic acid producedLactic Acid produced

CO2 formedNo CO2 formed

Releases high amounts of energyReleases low amounts of energy

Importance of Respiration of yeast in production of Bread and Wine

Anaerobic respiration in plants and microorganism produces ethanol and CO2 instead of lactic acid..

glucose ethanol (alcohol) + carbon dioxide + ENERGY

C6H12O6 2C2H5OH + 2CO2 + ATP

Bread Making

Yeast respires anaerobically converting the glucose into carbon dioxide. Carbon dioxide forms bubbles of gas in the dough and causes it to rise. When it is baked the gas bubbles expand more producing light airy bread.

Wine Making

Yeast respires anaerobically in very little oxygen and produces alcohol . Carbon dioxide is also formed making the drink or wine fizzy. This process is called Fermentation

Identifying if carbon dioxide is produced or if exhaled air contains carbon dioxide

Pass the gas through limewater. If limewater turns milky then carbon dioxide is present.Respiratory System

Differences between Inhaled air and Exhaled air

InhaledExhaled

More oxygen presentLess oxygen present

Less carbon dioxide presentMore carbon dioxide present

Usually colderUsually warmer

Normally drierMore moist