Questions and Answers
When does anaerobic respiration occur?
When muscle cells become short of oxygen and the heart cannot supply enough oxygen to the muscles fast enough.
What happens during anaerobic respiration?
Glucose is not broken down completely, produces lactic acid, releases a small amount of energy for cells.
What is the symbol equation for anaerobic respiration?
C6H12O6 > 2C3H6O3
How is muscle fatigue caused?
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What is an oxygen debt and how is it repaid?
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How can you tell how fit you are?
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How does anaerobic respiration occur in microorganisms?
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Study Notes
Anaerobic Respiration Overview
- Occurs when muscle cells lack sufficient oxygen, commonly during intense exercise.
- Happens without oxygen, leading to incomplete breakdown of glucose.
Processes During Anaerobic Respiration
- Glucose is partially broken down, resulting in lactic acid production.
- Releases a small amount of energy compared to aerobic respiration due to incomplete glucose breakdown.
Symbol Equation
- The reaction for anaerobic respiration is represented by the equation: C6H12O6 > 2C3H6O3 (glucose converts to lactic acid).
Muscle Fatigue
- Prolonged vigorous use of muscle fibers leads to inefficiency in contraction.
- Accumulation of lactic acid contributes to feelings of fatigue in muscles.
Oxygen Debt
- Refers to the amount of oxygen required to convert accumulated lactic acid back into carbon dioxide and water.
- Post-exercise, heart and breathing rates increase to supply the necessary oxygen for repaying the oxygen debt; higher lactic acid results in a greater oxygen debt.
Fitness Levels
- Good fitness indicates that the heart and lungs effectively supply oxygen to muscles.
- Poor fitness results in muscles experiencing oxygen shortage sooner during physical activity.
Anaerobic Respiration in Microorganisms
- Bacteria use anaerobic respiration for fermentation, producing yogurt.
- Yeast ferments glucose into ethanol and carbon dioxide, commonly used in baking and brewing.
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Description
This set of flashcards explores the key concepts of anaerobic respiration. Learn when it occurs, the process involved, and the outcomes of this energy-generating method that operates without oxygen. Ideal for biology students seeking to solidify their understanding of cellular respiration.