Respiration Converting and using energy

Respiration

Photosynthesis ReviewPhotosynthesis stored energy in the form of glucose. Glucose is what animals and plants use as their source of energy.But ATP is the usable energy in a cellnot glucose. So

Respiration: What is it?Essentially cellular respiration breaks food particles (glucose) down into ATP.ATP is the form of energy that cells can use.Respiration provides all living things with the energy they need.This is aerobic respiration, which requires oxygen.

Respiration: What is it?

Respiration: Who does it?All living things do cellular respiration including plants.

Respiration: Where does it happen?Mitochondria of a cellThe powerhouse of the cellFound in plants and animals

Respiration: How does is happen?3 steps of respiration:Glycolysis: Glucose broken down into smaller parts (2 molecules of Pyruvic Acid) ATP producedCitric Acid Cycle (Krebs Cycle): Pyruvic Acid is broken down into CO2More ATP is produced.

Respiration: How does is happen?3 steps of respiration:

Electron Transport Chain (ETC): Hydrogen is released and forms with oxygen to create water. More ATP is produced

Respiration: How does is happen?glucose + oxygen CO2 + water respiration

photosynthesis

Therefore the overall reaction of cellular respiration is the reverse of photosynthesis:

So whats the moral of the photosynthesis respiration story?? ITS ALL ONE BIG CYCLE!!NO TREES MEANS NO BREATHE

Check your understandingHow is respiration different than photosynthesis, how are they the same?

What is the definition of respiration?

Through what 3 steps does respiration produce ATP?The cell of an organism that starved to death is tested and found to have a high concentration of pyruvic acid. What failed?

Anaerobic respirationOften referred to as fermentation (in yeast)Does not require oxygen (O2)Byproduct is alcoholOnly happens in oxygen deprived environments- We had anaerobic respiration in our yeast lab! - BrewingDoes not produce as much ATP as aerobic respiration, therefore plants and animals use aerobic respiration whenever they can.

Anaerobic respirationIn animal cells the product is Lactic AcidOccurs during oxygen (O2) stressIt leads to muscle fatigue in athletes.Good cardio-vascular fitness can prevent muscle fatigue.

Does not produce as much ATP as aerobic respiration, therefore plants and animals use aerobic respiration whenever they can.