12.3 Anaerobic respiration
- Syllabus
- 0610–2026–2027
- Topic
- 12.3
- Level
- —
12.3.1—Anaerobic respiration as the chemical
- Describe anaerobic respiration as the chemical reactions in cells that break down nutrient molecules to release energy without using oxygen
12.3.2—Anaerobic respiration releases much
- State that anaerobic respiration releases much less energy per glucose molecule than aerobic respiration
12.3.3—Word equation for anaerobic
- State the word equation for anaerobic respiration in yeast as: glucose → alcohol + carbon dioxide
12.3.4—Word equation for anaerobic
- State the word equation for anaerobic respiration in muscles during vigorous exercise as: glucose → lactic acid
12.3.5—Anaerobic respiration equation
- State the balanced chemical equation for anaerobic respiration in yeast as: C 6H12O6 → 2C2H5OH + 2CO2
12.3.6—Lactic acid builds up in muscles
- State that lactic acid builds up in muscles and blood during vigorous exercise causing an oxygen debt
12.3.7—How the oxygen debt is removed after
- Outline how the oxygen debt is removed after exercise, limited to: (a) continuation of fast heart rate to transport lactic acid in the blood from the muscles to the liver (b) continuation of deeper and faster breathing to supply oxygen for aerobic respiration of lactic acid (c) aerobic respiration of lactic acid in the liver
Objective notes
7 learning objectivesConceptIGCSE Biology