9.1 Cellular Respiration: An Overview

Chemical Energy & Food Organisms get the energy they need from food. calorie-energy needed to raise 1 g of water, 1 degree.

Overview

In/Out Light DEPENDENT Water NAD+ ADP Out O2 ATP NADPH

In/Out Light INDEPENDENT ATP NADPH **CO2 Out NADP+ ADP Sugar

Overview of Cellular Respiration CR -release energy from food in the presence of oxygen. 6O2 + C6H12O6  6CO2 + 6H20 + Energy Oxygen +sugar carbon dioxide+water+energy

Cellular Respiration has 3 stages: Glycolysis-in cytoplasm (2ATP) Krebs Cycle-in mitochondria (2ATP) Electron Transport Chain-in mitochondria (32 ATP)

In cytoplasm In mitochondria

Oxygen & Energy Aerobic-CR that requires oxygen (Krebs & ETC) Anaerobic-CR that do NOT require oxygen (glycolysis)

Q: What is the relationship between photosynthesis & cellular respiration? A: Photosynthesis removes carbon dioxide from the atmosphere, and CR puts it back. Photosynthesis releases oxygen into the atmosphere, and CR uses that oxygen to release energy from food.

Photosynthesis Cellular Resp. Returns CO2 Uses O2 In Mitochondria In Plants and Animals Removes CO2 Releases O2 In Chloroplast In plants only Opposite Formulas

WS p130-132 #1-16 only Turn worksheet in when finished.