1. Life Science Chapter 2 Section 2
Respiration
Life Science
Chapter 2
Section 2

2. Storing and Releasing Energy
Captured energy is saved as carbohydrates
Sugars and starches
When carbohydrates are broken down, energy is released
When cells need energy they break down carbohydrates to release energy

3. Respiration
Respiration is the process that breaks down carbohydrates to release energy
This process occurs continuously
Respiration has two meanings
To breath
To break down carbohydrates for energy
Also known as cellular respiration

4. Respiration Equation

5. The Respiration Equation
Raw materials:
1 glucose molecule
6 oxygen molecules
Products:
6 carbon dioxide molecules
6 water molecules
Energy

6. The Respiration Equation
Plants undergo processes to produce glucose
autotroph
Animals obtain glucose from organisms they consume
Heterotroph

7. Two Stages of Respiration
Stage 1- Cytoplasm
Glucose molecules are broken down
No oxygen involved
Small amount of energy is released

8. The Two Stages of Respiration
State 2- Mitochondria
Small molecules broken down farther
Requires oxygen
Great deal of energy is released
Reason mitochondria is called the “power house”

9. Comparing Photosynthesis and Respiration
Photosynthesis and Respiration are opposite processes
Photosynthesis produces the energy and respiration releases into a useable form.

10. Fermentation Provides energy to cells Requires not oxygen
Low amount of energy

11. Fermentation
Alcoholic Fermentation
Lactic-Acid Fermentation
Yeast
Alcohol is a product
Other products
Carbon dioxide
Small amount of energy
Important to
Brewers and bakers
When cells lack oxygen and cells need energy- lactic acid is released
Occurs in athletes
Painful muscles
Weak and sore