1. CELL AND ENERGY
METABOLISM 101

2. Objective: Vocabulary:
Describe how energy is transformed into ATP for cell processes to occur using the law of themodynamics.
Vocabulary:
Metabolism
ATP
Endergonic reaction
Anabolism
ADP
Exergonic reactions
Catabolism
Chemosynthesis

3. Metabolism
Total of all the chemical reactions that occur in an organism.
Energy is important for metabolism, so if the reaction release energy is called exergonic; if it absorb energy, is endergonic.

4. There are two types of metabolic reactions.
What is the difference?
Activity: Discuss with a partner and write a complete definition for each reaction.

5. Possible answers
Anabolism: metabolic reaction in which material is build up from smaller particles material and energy is stored (endergonic).
Catabolism: metabolic reaction in which material is broken down, often releasing energy (exergonic).

6. Read pages 94 and 95.

7. Practice Discuss with your partner the following questions:
How are ATP and ADP alike?
How are they different?
According to figure 1.2, when is energy available for cell processes?
Where does the energy come from?
What reaction is catabolic and which one anabolic?

8. First law of thermodynamics
The total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed.

9. Closing activity
In a piece of paper, summarize how the law of thermodynamics sustains the mechanism by which ATP works to store and release energy.
Use complete sentence and the vocabulary words.
Once you finish, give it to the teacher.
Metabolism, Anabolism, Catabolism, ATP, ADP, Endergonic reaction, Exergonic reactions