5. Measuring Lung Volume Write down the volume of air you breathe out normally . This is your tidal volume Write down the volume of air you have forced out of your lungs This is your vital capacity An asthmatic can have their vital capacity measured with a peak flow meter This volume = This volume = You cannot breathe out all the air in your lungs – there is still a residual volume left
7. Why do the breathing rate and pulse rate need to increase with exercise? To supply more oxygen Oxygen is needed for aerobic respiration Respiration releases energy Aerobic respiration is respiration using oxygen
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