Respiration Flashcards
What is external respiration
process by which organisms exchange gases with their environment
what is internal respiration
the controlled release of energy from food
What is energy called and what is it used for
ATP - adenosine triphosphate
used for all metabolic reactions in the cell
What is aerobic respiration
the controlled release of energy from food using oxygen
what is the balanced equation for aerobic respiration
C6H12O6 + 6 O2 —–> 6 CO2 + 6 H2O + ATP
How much of the energy on glucose in converted to ATP
40%
What happens to any energy not used
lost as heat
What are the two stages in aerobic respiration
Stage 1 - Glycolysis
Stage 2 - Krebs cycle
What are the differences between stage 1 and stage 2
Stage 1 : no oxygen
occurs in cytosol of cell
2 ATPs produced
incomplete breakdown of glucose
Stage 2 : O2 required
lumen of mitochondria
38 ATPs produced
complete breakdown of glucose
What is glycolysis
the conversion of glucose into two molecules of pyruvic acid
What is glucose broken down into
2 pyruvate - 3 carbon molecule
What are the products of glycolysis
2 ATP + 2 NADH
What does pyruvate convert to for aerobic respiration
Acetyl CoA - 2 carbon molecule (CoA- coenzyme A)
