Biological systems need energy!

1
Biological systems need energy!

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

2
Chemical Energy..

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

3
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

4
ADP to ATP cycle
ADP P

• ADPdi phosphate
• ATP tri phosphate
• ATP makes a muscle work

High energy ATP
-P after cell work
ADP in cell
5
Stored energy in glucose bonds
ADP in cell
Respiration

P
Forms ATP
so cell can do work
Release of food energy
6
Light energy Ch.9.2

• Primary Energy Source for?
• Photosynthesis
• Used by
• Plants
• Chlorophyll

7
Photosynthesis . . . .

• Plants make?
• Require?
• 1. Sunlight
• 2. Chlorophyll
• 3. Water roots
• 4. ? gas

8
Plant Photosynthesis..

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

9
Chemical Equation gtgtgtgtgtgt

• Carbon
• dioxide water energyfood oxygen
• (sugar)
• CO2 H20 sun C6H1206 O2

10
Cellular Respiration Ch. 9.3

• BOTH plants animals breakdown food
• 1. Releases energy
• 2. Makes cell energy
• 3. Reverse of photosynthesis !

11
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

12
Cellular Respiration.

• Breakdown of Food
• Occurs in the Mitochondria of
• Plant Animal Cells
• Produces?
• ATP cell energy
• CO2 gas waste

13
Respiration Equation gtgtgtgtgt

• Opposite of Photosynthesis
• food oxygen ATP CO2 H20
• C6H1206 O2 ATP CO2 H20

14
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

15
Equation Comparison

• 6CO2 6H20 sun C6H1206 6O2
• Photosynthesis
• Respiration
• C6H1206 6O2 ATP 6CO2 6H20