Cell Energy All cells need energy to survive

Cell Energy § All cells need energy to survive. Plant Cells energy comes from the sun and nutrients in the soil. Animal Cells energy comes from food.

Photosynthesis § Plants have pigments that absorb light. § Chlorophyll is the main pigment that gives the plant its green color. § Chlorophyll is found in Chloroplasts.

§ Plants use the energy captured by chlorophyll to change to carbon dioxide and water into food. § The food is then changed into glucose. ( sugar) The glucose is stored in the plant. § Photosynthesis produces oxygen.

Getting energy from food. § There a couple ways of getting energy from food. § Cellular Respirationthe process by which cells use oxygen to produce energy from food.

§ Most complex organisms (* plants and animals) obtain energy through cellular respiration. § During C. R. food is broken down into CO 2 and H 2 O. § Animals use most energy to maintain body temp. § Some energy is used to form adenosine triphosphate. ( ATP)

§ Prokaryotic Cells-CR takes place in the cell membrane. § Eukaryotic Cells- CR takes place in the mitochondria. § Fermentation- the breakdown of food without the use of oxygen § Two Types:

§ 1. Fermentation happens in your muscles and produce lactic acid. § * This is why your muscle begin to have a burning sensation. ( Muscle Fatigue) § 2. Fermentation happens in some types of bacteria and yeast.

Connection between Photosynthesis and CR § During photosynthesis cells use CO 2 to make glucose and the cell release O 2. § During CR cells use O 2 to break down glucose and release CO 2

I’ll be Back…. .

§ http: //highered. mcgrawhill. com/sites/dl/free/0078617022/164155 /00053412. html (Photosynthesis /consumption) § http: //i-biology. net/ Fossil Fuels