Respiration Flashcards
(9 cards)
1
Q
Respiration
A
The breakdown of food (carbohydrates) to release energy. It is an enzyme-controlled process.
2
Q
Aerobic respiration
A
- Is the enzyme-controlled release of energy from food (carbohydrates) using oxygen.
- Occurs in the mitochondrion.
3
Q
Word equation
A
Glucose + oxygen ➡️ Energy + water + carbon dioxide
4
Q
Balanced symbol equation
A
C6H12O6 + 6O2 ➡️ 6CO2 + 6H2O + 2820kJ
5
Q
Stage 1
A
-Glycolysis
-Occur in the cytosol
-Glucose (6-carbon molecule) broken down two three-carbon molecules (pyruvic and pyruvate acid)
6
Q
Stage 2
A
-Krebs cycle
-Occur in the mitochondrion
-Two three-carbon molecules broken down to produce water and carbon dioxide.
-Water and CO2 byproducts.
7
Q
Anaerobic respiration / Fermentation
A
- It is the controlled release of energy from food in the absence of oxygen.
- Very little energy is produced as the substrate (glucose) is not fully broken down.
- Occurs in the cytosol.
8
Q
Lactic acid fermentation
A
In muscle: Glucose ➡️ lactic acid + very little energy
9
Q
Alcohol fermentation
A
Glucose ➡️ Alcohol/Ethanol + CO2 + very little energy
