What is Cellular Respiration?

Cellular Respiration Overview

• Transformation of chemical energy in food into ATP (chemical energy cells can use)

• These reactions proceed the same way in plants and animals. Process is called cellular respiration

• It happens in the mitochondria

Glucose+ Oxygen Carbon Dioxide + Water + EnergyEnergy

The equation=

Overall Reaction:C6H12O6 + O2 → CO2 + H2O

CELLULAR RESPIRATION EQUATION:        C6H12O6 + O2   CO2  + H2O + Energy

PHOTOSYNTHESIS EQUATION:         CO2 +  H2O + LIGHT   C6H12O6  + O2

3 Steps

• There are three steps in the process of cellular respiration: –1. Glycolysis–2. Krebs Cycle (Citric Acid Cycle)–3. Electron transport chain.

•GGet et KKrunk runk EEveryoneveryone

• All 3 steps produce ATP. The electron transport chain produces the most!

Types of Cellular Respiration: Aerobic vs. Anaerobic

• Aerobic- oxygen required• Anaerobic- no oxygen required– If oxygen is not present, products such

as ethanol and CO2 (single cell fungi (yeast) in beer/bread) or lactic acid (muscle cells) are produced.

– Some organisms thrive in environments with little or no oxygen

– Marshes, bogs, gut of animals, sewage treatment ponds

Photosynthesis vs. Cellular Respiration.

AND Animals vs. Plants

Cellular Processes

Reactants of Cellular Processes

Products of Cellular Processes

Equations of Cellular Processes

       C6H12O6 + O2   CO2  + H2O + Energy

CO2 +  H2O + LIGHT   C6H12O6  + O2

Steps in the process

Where it takes place

Energy

Nutrient Absorption

Hormone Response• Phototropism

Gas Exchange• Stoma- opening in the

underside of a leaf that allows carbon dioxide and oxygen to diffuse into and out of the leaf

• Guard cell- specialized cell in the epidermis of plants that controls the opening and closing of stomata by responding to changes in water pressure

How it gets food

• I can make my own food= A______.

• I cannot make my own food=H____.

Stable Internal Environment