B9 Respiration
- Created by: Luke Newton1
- Created on: 06-12-17 16:41
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- B9 Respiration
- B9.1 Aerobic Respiration
- Cellular respiration is an exothermic reaction that occurs continuously in living cells
- Glucose + Oxygen -> Carbon Dioxide + Water
- The energy transferred supplies all the energy needed for living processes
- B9.2 The Response to Exercise
- The energy that is transferred during respiration is used to enable muscles to contract
- During exercise the human body responds to the increased demand for energy
- Increase in heart and breathing rate and breath volume
- Glycogen turned into Glucose for cellular respiration
- Increase in the flow of oxygenated blood to the muscles
- The responses act to increase the rate of supply of oxygen and glucose and the removal of carbon dioxide to and from the muscles
- B9.3 Anaerobic Respiration
- After a long time of hard work muscles become fatigue and do not contract efficiently, if they don't get enough oxygen they respire anaerobically
- Anaerobic Respiration is respiration without oxygen, instead glucose ins broken down into lactic acid
- It transfers less energy than aerobic respiration
- After exercise oxygen is still needed to break down lactic acid, the amount nodded is know as Oxygen Debt
- In plants and some microorganisms it produces ethanol and carbon dioxide
- Metabolism and the Liver
- Metabolism is the sum of all the reactions in the body
- The energy transferred by respiration in cells is used by the organisms for the continual enzyme controlled processes of metabolisms
- It converts
- Glucose -> Starch/glycogen/cellulose
- Fatty Acids -> glycerol -> lipids
- Glucose and nitrate ions -> amino acids
- Amino acids -> Protien
- Blood flowing through the muscles transports lactic acid to the liver where it is then converted back into glucose
- B9.1 Aerobic Respiration
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