Conservation of energy and transformation

Topics: Metabolism, Energy, Enzyme Pages: 16 (480 words) Published: December 3, 2014
Conservation of energy and
transformation of energy.
By Paige, Stacie, Amelia.

Objectives



Learning about Conservation of energy
Learning about transformation of energy

Conservation – Preserving a substance.

Metabolism

Metabolism is a process in which you break down foods into calories and these are combined with oxygen to release the energy that your body needs in order to function/live.
This is a very complicated bio-chemical process.
Metabolism is essential for the energy for these functions:
Breathing

Circulating blood

Adjusting hormone levels

Growing and repairing cells

Digestive system/food processing

Physical Activity
Everyone has a different metabolic rate. It all depends on the number of calories that your body uses. These factors determine this:

Your body size and composition

Your sex

Your age


Reference - http://www.mayoclinic.org/healthy-living/weight-loss/in-depth/metabolism/art20046508

Conservation of energy
Energy is constant. Energy is neither created nor destroyed. We change it from one energy into another.
An example of this is Kinetic energy.

Transforming of energy
Transformation of energy starts with the digestive system. The digestive system is essential for metabolism to take place. The digestive system breaks down complicated food particles into molecules (Catabolism) like this:

Fat breaks down into Fatty acids by using an enzyme called Lipase. Protein breaks down into Amino Acids by an enzyme called protease. Starch breaks down into sugars by using an enzyme called amylase. These enzymes are produced by hormones. The hormones are activated when you eat. Once we have broken these down, we can then build them back up again into a collection of molecules (Anabolism) so we can digestive them and use them in our cells to make energy. This is all controlled by hormones.

Catabolism – Cutting down particles into molecules
Anabolism – Building molecules up again.
In order to do this transformation you need energy itself. A chemical energy called ATP (Adenosine triphosphate) is an unstable molecule which hydrolysis (hydrates) itself to become ADP. The ADP then creates the energy source for the transformation process.

https://
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Now for a
quiz!
Write the answer on a piece of
paper

1. In digestion, what are
proteins broken down into?
A – Fatty acids
B – Glucose
C – Amino acids

2. What are fats broken down
into?
A – Fatty acids
B – Glucose
C – Amino acids

3. What are carbohydrates
broken down into?
A – Fatty acids
B – Glucose
C – Amino acids

4. What is the purpose of
metabolism?

5. Why do we need to break fats,
carbs and proteins down?

6. This process of breaking down the
molecules called catabolism. True or false?

7. What is anabolism?
When the molecules build back up again.

8. Which enzyme digests
fats?
A – Amylase
B – Lipase
C – Protease

9. Which enzyme digests
proteins?
A – Amylase
B – Lipase
C – Protease

10. Which enzyme digests
carbohydrates?
A – Amylase
B – Lipase
C – Protease

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