Transcript Just Breathe… - Rimac-Science-Web

Just Breathe…
Biology
11/30/10
Energy
• What sources of
energy do we know?
• Food
• NADPH
• ADP
• ATP
Energy
• Why is Energy important?
• Metabolism!
• Catabolism: releases energy by splitting
complex molecules into smaller
components.
• Anabolism: synthesis of complex
molecules from simpler building blocks.
Energy
• How is energy
measured?
• Calorie
• 1 calorie is the
amount of energy
needed to raise the
temperature of 1
gram of water 1
degree Celsius.
Energy
• How do we get to that energy?
• Cellular Respiration!
• The controlled process that releases
energy from food in the presence of
oxygen
Cellular Respiration
• In the presence of O2, glucose is broken
down and rearranged to form carbon
dioxide, water and energy.
6O2 + C6H12O6 ---> 6CO2 + 6H2O + energy
Cellular Respiration
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Aerobic Respiration
NEEDS OXYGEN!!!
Most eukaryotes and prokaryotes
Nutrients are catabolized to carbon
dioxide and water.
• 4 stages of aerobic respiration
Aerobic Respiration
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1. Glycolysis (in cytosol)
2. Formation of acetyl CoA (in mito)
3. Citric Acid/ Krebs Cycle (in mito)
4. Electron Transport and chemiosmosis (in mito)
It’s the most wonderful time of
the year!
Christmas...