Breakout #1
Answer the following questions:
a) Why do your cells need energy? What are some things
they do that require energy?
b) Where do you think your cells get the energy that they
need?
Video Notes
Cellular Respiration: Energy Transfer in Cells
http://education-portal.com/academy/lesson/cellularrespiration-energy-transfer-in-cells.html#lesson
Keep this question in mind:
How do our cells obtain energy from food?
Breakout #2
How are ATP/ADP like a rechargeable battery?
 Explain using both pictures and words. Be sure to use the
terms ATP, ADP, energy.
ATP
ADP
How is ATP made in living things?
 By releasing the chemical energy stored in food to
convert ADP back into ATP
 Two possibilities depending on whether oxygen (O2) is
needed or not:
1.
2.
Fermentation: does not require oxygen (anaerobic)
Cellular Respiration: requires oxygen (aerobic)
Fermentation
 Does not require oxygen (anaerobic)
 Occurs in the cytoplasm of cells
 Partially breaks down glucose to produce 2 ATP
 Two common types:
1. Alcohol fermentation
2. Lactic acid fermentation
1. Alcohol Fermentation
 Glucose is broken down into ethanol(alcohol) and
carbon dioxide, releasing enough energy to create 2
ATP
C6H12O6  2 C2H5OH + 2 CO2 + 2 ATP
glucose  ethanol + carbon dioxide + energy
 Example: yeast causing bread to rise
2. Lactic Acid Fermentation
 Glucose is broken down into lactic acid, releasing
enough energy to create 2 ATP
C6H12O6  2 C3H6O3 + 2 ATP
glucose  lactic acid + energy
• Examples:
▫ Occurs in your muscles during rapid exercise
▫ Used in the dairy industry to make cheese and yogurt
Cellular Respiration
 Requires oxygen (aerobic)
 Occurs within the cytoplasm
and mitochondria of your cells
 Fully breaks down glucose in the
presence of oxygen, releasing enough energy to
produce up to 38 ATP
C6H12O6 + 6 O2  6 CO2 + 6 H2O + 38 ATP
glucose + oxygen  carbon dioxide + water + energy
Breakout #3 – Brain Pop!
While watching the brain pop keep these questions in
mind:
Why do humans need oxygen to survive?
How is your respiratory system related to cellular
respiration?