Enzymes, Respiration and Exercise
- Created by: isabella newsum
- Created on: 16-11-14 20:38
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- Enzymes, Respiration and Exercise
- Respiration
- The process of releasing energy from glucose, which goes on in every cell
- Involves many reactions all of which are catalysed by enzymes
- Aerobic Respiration
- Using oxygen
- Plants and Animals
- Glucose+Oxygen -> Carbon Dioxide
- The energy released is used...
- To build up larger molecules from smaller ones
- In animals to allow muscles to contract
- In mammals and birds- body temperature steady
- In plants to build sugars, nitrates and other nutrients into amino acids- built up into proteins
- Aerobic Respiration
- Using oxygen
- Plants and Animals
- Glucose+Oxygen -> Carbon Dioxide
- The energy released is used...
- To build up larger molecules from smaller ones
- In animals to allow muscles to contract
- In mammals and birds- body temperature steady
- In plants to build sugars, nitrates and other nutrients into amino acids- built up into proteins
- Exercise
- Increase in muscle activity requires more glucose and oxygen to the muscle cells
- Physical Activity...
- increases breatthing rate nd makes you breathe more deeply to meet the demand for extra oxygn
- increases the speed at which the heart pumps
- Some glucose from food is stored as glycogen
- Mainly stored in th liver, but each muscle has its own store
- Anaerobic Respiration
- When body can't supply enough oxygen to your muscles
- Without oxygen
- glucose -> energy+lactic acid
- Lactic acid- builds up in muscles which causes muscle fatigue and therefore stop contracting efficiently, but you can keep using your muscles for longer
- Oxygen Debt
- "Repay" oxygen that you didn't get in time- lungs, heart and blood couldn't keep up with the demand earlier on
- Blood flows through your muscles to remove the lactic acid by oxidising it
- Respiration
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