1. Bellringer
 Describe how acids affect proteins in the body.
 What do you think people mean when they say
someone has a fast metabolism?

2. Agenda
 Collect Homework
 Guided Notes: pH and Protein
 NOTES: Metabolism
 Anabolic vs Catabolic reactions
 Photosynthesis
 Cellular Respiration
 Fermentation

3. Metabolism
 The word metabolism refers to all of the chemical
reactions that take place within living things
 There are 2 types of metabolic reaction
1) Anabolic Reactions
 Building large molecules from small ones
 Anabolic reactions require energy
2) Catabolic Reactions
 Tearing apart large molecule into small ones
 Catabolic reactions release energy

5. CAT = Destruction

6. Photosynthesis
 Photosynthesis is a chemical reaction in which
plants combine water and carbon dioxide gas to
create glucose (sugar).
 Oxygen gas is given off as a waste product.

8. Photosynthesis is Anabolic
 Photosynthesis is considered an anabolic
process for 2 reasons
 It combines small molecules to make large.
Making a single molecule of glucose requires
6 waters and 6 carbon dioxides.
 It requires energy. Photosynthesis is only
possible when the plant absorbs energy from
the sun.

10. Catabolic Reactions
 In order to use the energy stored in glucose, the
molecule must be broken apart.
 There are 2 types of catabolic reactions
 Respiration: Aerobic (requires oxygen)
 Fermentation: Anaerobic (Doesn’t require oxygen)

11. Cellular Respiration
 Cellular Respiration uses oxygen to break
down food. When glucose is broken down it
releases energy.
 Water and Carbon Dioxide are created as
waste.

12. Respiration explains why
animals exhale CO2

13. Compare photosynthesis &
respiration . . .

14. Fermentation
 Fermentation is a way to break down glucose
without using oxygen, but produces less
energy
 Fermentation is done by many bacteria, and by
animals when they are “short of breath”.
 2 types of fermentation
 Alcohol: Done by fungi and bacteria
 Lactic Acid: Done by bacteria and animals

15. Alcohol Fermentation
 Alcohol fermentation
produces 2 waste products
 Carbon Dioxide Gas
 Alcohol
 Beer is created by allowing
yeast to digest barley grain.
In fact, all alcoholic
beverages are created by the
digestive process of
microscopic organisms

16. Lactic Acid Fermentation
 Lactic Acid fermentation is
used in the production of
dairy items like cheese and
yogurt.
 Humans also produce lactic
acid in their muscles during
intense exercise. The
buildup of this acid explains
why your muscles burn after
working out.

18. BrainPOP: Metabolism