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Biology
Biology - Respiration
Term | Definition |
---|---|
Respiration | releasing of energy |
Exothermic | a reaction where energy is GIVEN OUT |
Endothermic | a reaction where energy is TAKEN IN |
Aerobic respiration | • Provides energy • Requires oxygen • In mitochondria • Used to break down food molecules |
Word equation for aerobic respiration | glucose + oxygen → carbon dioxide + water |
Anaerobic respiration | • Does not require oxygen • Provides less energy that aerobic respiration • Occurs during intense exercise • Only occurs in the cytoplasm of cells |
Word equation for anaerobic respiration | Glucose -> lactic acid |
Lactic acid | created from glucose in muscles during anaerobic respiration |
What does lactic acid cause | fatigue |
Body’s response to exercise | • Increase in breathing rate • Increase in heart rate • Increase in breath volume |
Breathing rate | The rate oxygen is taken into the lungs |
Heart rate | The number of times the heart beats per minute |
Breath volume | the amount of air breathed in with each breath |