Introduction to Cellular Respiration. Introduction To Cellular Respiration How did you get the energy to get ready this morning? Where did you get your

Introduction to Cellular Respiration

Introduction To Cellular Respiration

• How did you get the energy to get ready this morning?

• Where did you get your energy?

• What had to happen within you for you to get energy?


• The energy that you use for your daily processes is harvested by cellular respiration

• In cellular respiration O2 is consumed as glucose is broken down into CO2 and H2O and the cell captures that energy as ATP


• Cellular respiration has a set chemical reaction

• Just like photosynthesis there is a set pathway with set inputs and products



• What does this equations remind you of?

• Photosynthesis and CR are linked

• The products for photosynthesis are the reactants for CR

• The products for CR are the reactants for photosynthesis



• All cells break down molecules for energy

• Both autotrophs and heterotrophs create chemical energy from food

• Heterotrophs break down food that has been consumed

• Autotrophs break down food that they have produced

Stages of Cellular Respiration

• Cellular Respiration happens in stages

• Very similar to photosynthesis, there are stages to cellular respiration– Glycolysis– Anaerobic cellular

respiration– Aerobic cellular

respiration

Stages of Cellular Respiration

• Glycolysis happens first and will happen every time cellular respiration starts

• After that there are two different pathways that could be followed

• Aerobic respiration requires oxygen

• Anaerobic respiration does not require oxygen

The Mighty Mitochondria

• Think back to cell as a city• What job did we give the

mitochondria?• The mitochondria has

two main areas• The matrix is the inner

space filled with fluid • The inner membrane is a

folded membrane on the inside the mitochondria


• The aerobic parts of cellular respiration are performed in the mitochondria

• Every part of cellular respiration that involves oxygen is done in the mitochondria


• Glycolysis happens in the cytoplasm

• The Krebs Cycle “Citrus Acid Cycle” happens in the matrix

• The process of oxidative phosphorylation happens in the inner mitochondria membrane

Other Information

• Cellular respiration is an exergonic process

• This means it gives off energy

• The energy that it gives off can be measured

• We measure its energy in calories or kilocalories

Other Information

• A calorie is the ability for a unit of energy to heat one gram (one mL) of water one degree Celsius

• A kilocalorie is the ability heat one kilogram of water (one L) one degree Celsius

http://foodmatters.tv/articles-1/the-30-worst-foods-in-america-beware

2,500,000 Liters



Other Information

• Cellular respiration is not an exact process

• It can only harvest around 34% of the energy in a molecule of glucose

• Everything else is lost as heat

Documents

Introduction to Cellular Respiration. Introduction To Cellular Respiration How did you get the energy to get ready this morning? Where did you get your