1. Cellular Respiration
Food to energy

2. Autotrophs Heterotrophs “Self-feeders”
Plants and other organisms that make all their own organic matter from inorganic nutrients
Heterotrophs
“Other-feeders”
Humans and other animals that cannot make organic molecules from inorganic ones

3. Harvesting Chemical Energy
From photosynthesis we get carbohydrates (glucose)
Cellular respiration: Breaking down the carbohydrates (glucose)
Starts with glycolysis
Glyco = sugar
Lysis = breaking
Breaking down sugars

4. Producers
Biologists refer to plants and other autotrophs as the producers in an ecosystem
Consumers
Heterotrophs are consumers, because they eat plants or other animals
Figure 6.2

5. Sunlight
energy
Ecosystem
Photosynthesis
(in chloroplasts)
Glucose
Carbon dioxide
Oxygen
Water
Cellular respiration
(in mitochondria)
for cellular work
Heat energy
Figure 6.3

6. The Relationship Between Cellular Respiration and Breathing
Cellular respiration and breathing are closely related
Cellular respiration requires a cell to exchange gases with its surroundings
Breathing exchanges these gases between the blood and outside air

7. The Overall Equation for Cellular Respiration
A common fuel molecule for cellular respiration is glucose
This is the overall equation for what happens to glucose during cellular respiration
Glucose
Oxygen
Carbon
dioxide
Water
Energy
Unnumbered Figure 6.1

8. The Role of Oxygen in Cellular Respiration
During cellular respiration, hydrogen and its bonding electrons change partners
Hydrogen and its electrons go from sugar to oxygen, forming water