B2 Aerobic and Anaerobic Respiration
- Created by: EllenMIW
- Created on: 31-12-15 19:38
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- Aerobic and Anaerobic Respiration - B2
- Aerobic respiration
- Chemical reactions inside cells controlled by enzymes
- Glucose +oxygen - carbon dioxide + water (+energy)
- Takes place continuously in plants and animals
- Energy produced used...
- To build larger molecules from smaller ones
- To enable muscles to contract in animals
- To maintain a steady body temp in cold in birds and mammals
- To build up sugars, nitrates and other nutrients into amino acids in plants
- Exercise
- Changes
- Heart rate increases
- Rate and depth of breathing increases
- Increase rate of blood flow to muscles, so increase supply of sugar and oxygen, increasing rate of CO2 removal
- Stored glycogen converted back to glucose
- Changes
- Anaerobic respiration
- If insufficient oxygen is reaching the muscles
- The incomplete breakdown of glucose
- Produces lactic acid
- Oxygen debt has to be repaid in order to oxidise lactic acid into water and carbon dioxide
- Causes muscle fatigue
- Aerobic respiration
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