Respiration and exercise
- Created by: Laurenskye
- Created on: 29-03-16 15:14
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- Aerobic Respiration
- Glucose + O2 > CO2 + H2O (+ ENERGY)
- Most reactions of respiration take place in the mitochondria and are controlled by enzymes.
- The energy produced may be used by the organism to: 1.Build larger molecules from smaller ones. 2.Enable muscle contraction. 3. Maintain a constant body temp 4. Build sugars, nitrates, and other nutrients into amino acids and then proteins in plants.
- The limewater test is used to detect CO2. When CO2 is present, limewater goes cloudy.
- Anaerobic respiration
- When muscles are used over a long period of time they will become fatigues and stop contracting efficently
- The glucose is not completely broken down in anaerobic respiration and lactic acid os produced.
- Glucose > Lactic acid + Energy
- When your muscles cannot get enough oxygen for aerobic respiration, they start to respire anaerobically.
- Effects of exercise on the body
- You need to increase the rate at which o2 and glucose reach the muscle cells for aerobic respiration.
- You also need to remove the extra waste co2 produced quicker.
- when you exercise your muscles need more energy so that they can contract.
- The heart rate increased and the blood vessels supplying the muscles dilate, this allows more bloody containing o2 and glucose to reach the muscles.
- Muscles store glucose as glycogen. The glycogen can be converted back to glucose for use during exercise.
- Your breathing rate and the depth of each breath also increases, this allows a greater uptake of o2 and release of co2 at the lungs.
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