Download Cell Respiration copy

Cellular Respiration
Biology
What does this remind you of?
Cellular Respiration
n 
The process that releases energy by breaking
down glucose
n 
Occurs in ALL living cells
n 
Chemical Formula for respiration
C6H12O6 + O2 à CO2 + H2O + ATP
n 
Glucose + Oxygen à Carbon Dioxide + Water +
ATP
Aerobic Cellular Respiration
Uses Oxygen
n  Releases energy
Occurs in 3 stages:
n 
1. GLYCOLYSIS
2. KREBS CYCLE
3. E- TRANSPORT CHAIN
Overview: Aerobic Respiration
Step 1: Glycolysis
n  Occurs
in the cytoplasm (fluid surrounding
cell organelles)
Glucose is converted (changed) into pyruvic acid
(1 glucose = 2 pyruvic acids)
¨  2 ATP molecules are produced
¨ 
Step 2: Krebs Cycle (aka Citric Acid Cycle)
n  Occurs
in mitochondria
n  Pyruvic acid from glycolysis is broken down
into CO2
n  1 molecule of ATP is produced for each pyruvic
acid (total of 2)
Electron Transport Chain
n  The
Krebs Cycle generates high-energy
electrons that are passed to the electron
transport chain
n  Here they are used to change ADP to
ATP
n  Water is formed
Totals for Aerobic Respiration
n  Production
of 36 ATP molecules
n  Heat is also released
¨ this
is why you feel warm after you exercise
Anaerobic Cellular Respiration
n  Does
not use Oxygen
n  Releases energy
n  Occurs in 2 steps
1. Glycolysis
2. Lactic Acid Fermentation
OR
2. Alcoholic Fermentation
Lactic Acid Fermentation
n  Lactic
Acid is produced
n  Sore muscles after a workout
n  How bacteria makes yogurt
Alcoholic Fermentation
n  Ethyl
alcohol is produced
n  How yeast makes bread
Totals for Anaerobic Respiration
n  Anaerobic
Cellular Respiration produces a
total of 2 ATP molecules