Biological systems need energy!

• To do “work”• Chemical activities• Growth• Movement• Reproduction• Repair• ? Stored in• CHEMICAL BONDS

Chemical Energy…………..

• Stored in?• Food (Plant or Animal)• Made by Producers in?• Photosynthesis as?• Glucose sugar• Energy is released?• Respiration, breaks • the chemical bonds

ATP cell energy Ch.9.1• High energy molecule

• Supplies cell energy

• ATP cycles from ADP

• by addition of a high energy phosphate

• from the release of chemical energy

• in respiration

ADP to ATP cycle• ADP=di

phosphate• ATP= tri

phosphate• ATP makes a

muscle work ADP in cell

ADP+PHigh

energyATP

-P aftercell work

ADP in cell Stored energy inglucose bonds + Respiration

= Release offood energy

Forms

ATP so cell can do work

+

P

Light energy Ch.9.2• Primary Energy

Source for?

• Photosynthesis• Used by• Plants • Chlorophyll

Photosynthesis . . . .

• Plants make?

• Require?

1. Sunlight

2. Chlorophyll

3. Water roots

4. ? gas

Plant Photosynthesis……..

• Makes Food• Uses• Sunlight• Carbon dioxide• Water• Chlorophyll

Chemical Equation >>>>>>

Carbon

dioxide + water +energy=food + oxygen

(sugar)

CO2 + H20 +sun = C6H1206 + O2

Cellular Respiration Ch. 9.3

• BOTH plants & animals breakdown food

1. Releases energy

2. Makes cell energy

3. Reverse of photosynthesis !

Burning versus Respiration

Burning:• Activated by

friction• Heat Energy• Light Energy• Carbon Dioxide• Oxygen

Respiration:• Activated by

enzymes• Heat Energy• ATP cell energy• Carbon Dioxide• Oxygen

Cellular Respiration……….

• Breakdown of Food• Occurs in the

Mitochondria of

• Plant & Animal Cells

• Produces?

• ATP cell energy

• CO2 gas waste

Respiration Equation >>>>>

• Opposite of Photosynthesis

food + oxygen = ATP+ CO2 +H20

C6H1206 + O2 = ATP+ CO2 +H20

Comparison of both ……..

PHTOSYNTHESIS

Make food

Give off O2

Use sunlight

Use CO2

RESPIRATION

Break apart food

Use oxygen

Make cell energy

Give off CO2

Equation Comparison:

6CO2 + 6H20 + sun = C6H1206 + 6O2

• Photosynthesis

• Respiration

C6H1206 + 6O2 = ATP+ 6CO2 +6H20