Match the key word to the correct definition

Match the key word to the correct definition: Tidal Volume How much air can be breathed out over and above tidal volume Vital Capacity How much air can be breathed in over and above tidal volume Residual Volume Largest volume of air that can be moved in and out of the lungs in any one breath Inspiratory Reserve Volume of air that always remains in the lungs Expiratory reserve Volume of air moved in and out of the lungs with each breath at rest

Match the key word to the correct definition: Tidal Volume of air moved in and out of the lungs with each breath at rest Vital Capacity Largest volume of air that can be moved in and out of the lungs in any one breath Residual Volume of air that always remains in the lungs Inspiratory Reserve Volume How much air can be breathed in over and above tidal volume Expiratory reserve Volume How much air can be breathed out over and above tidal volume

What you need to do! 1. In small groups (no bigger than groups of 4) complete spirometer investigation and calculate tidal volume on your own read out 2. While waiting for/when finished practical make sure all textbook questions from 58 -60 are completed

Past Paper Question The diagram below shows the trace from a spirometer. A spirometer is a device designed to measure the volume of air entering and leaving the lungs. A chamber in the spirometer contains soda lime to absorb the carbon dioxide released from respiration. The measurements shown were recorded from a healthy 16 year old student at rest. (i) Calculate the mean tidal volume in the first 20 seconds. Express your answer to two decimal places. Show your working (ii) At a certain point, the student was asked to breathe in as deeply as possible and then breathe out as much as possible. The resulting change in the trace is shown in the diagram as X. State the term given to measurement X