Metabolism

1
Metabolism

• Chapter 14

2
The Main Function of Metabolism

• Metabolism What is it?
• Homeostasis To maintain
• this, the body regulates its
• systems to avoid dangerous
• lacks or excesses.
• Ex. You breathe to take in oxygen and
• expel carbon dioxide

3
The Metabolic Process

• Four Conditions
• Chemical balance body needs the
• right balance of nutrients and
• other substances.
• Just like a car needs hydrogen and
• carbon to run.

4

• 2. Oxygen many metabolic
• processes require oxygen
• to take place (breathing)
• It is like burning of gasoline
• that make an engine run.

5

• 3. Temperature an organisms body
• temperature must be within a
• certain range.
• A car wont start if its temp. is too low.

6

• 4. Removal of waste products
• the waste products of metabolism
• are water and carbon dioxide.
• Carried in the blood to the lungs
• where you exhale them.
• Exhaust system to rid water
• vapor and carbon monoxide.

7
Energy for Metabolism

• During metabolism, energy is both
• used and produced.
• Energy originates from the sun.
• Plants trap energy.
• Humans eat the plant, they gain nutrients
• which provide energy for metabolism.

8

• Three nutrients that produce energy.
• What are the nutrients?

9

• 1. Carbohydrates
• -bodys preferred source
• of energy.
• -quickly broken down into
• simple sugars.
• -some reserved as Glycogen.
  
• -remaining are converted to fat.

10

• Fats
• - in diet are stored in fat tissue
• until needed for energy.

11

• Proteins
• -mainly used to build the bodys
• own protein.
• -excess converted to fat