Lab Practical Instructions Put your stuff down in the back and sit down (all you need is a pen/pencil) Take an answer sheet When we begin, you will have 60 sec per station When timer beeps, move over one station. Remain seated except when changing seats You will have the chance to see a few stations again at the end

Practical Instructions Scopes: all are set up and focused, with pointers in the right eyepiece pointing to relevant structures Hearts: flags mark structures Model: tape marks structures Vessel diagrams: Numbered lines point to vessels to name

Practical instructions There are 6 stations per row in the 4 main rows and 2 stations on the side for a total of 26 Each station has two questions, an A and a B each worth 1 point There are 2 extra credit points possible) Write your answers in the blanks. Start writing in the blank numbered the same as the station you are at. Move as follows (One seat at a time):

Door Front of room

Lab 37A Measuring Respiratory Physiology

Key Respiratory Capacities Tidal volume: the normal amount you breathe in and out at rest. ERV (expiratory reserve volume): the amount of air you have left in your lungs after you exhale normally Vital capacity: Total air volume available. IRV (inspiratory reserve volume): the amount of air you can inhale after you inhale normally Residual volume: air left in lungs after maximal exhalation.

Spirometers We will be measuring expiration only. Do not do it if you are sick Use a disposable mouthpiece Use wet flow spirometer to measure: Tidal volume: exhale just as you are doing right now, listing to me talk (no, I don’t mean snoring). Should be around 500ml (.5L) ERV (expiratory reserve volume): exhale normally, pause, hold your nose and exhale as much more as you can into the tube Vital capacity: inhale max, exhale max, then inhale max again, clip nose, and exhale as much as possible into the hose

To do: Activity 1: operate the model lung Activity 2: listen to respiratory sounds Activity 3: gather data on nonrecording spirometers (groups of 3-4) and follow along with manual pages : Measure respirations per minute (have a partner count your breaths) Measure 3 times, record in lab manual, and calculate avg for: –TV –ERV –VC

To do: Calculate IRV Compare to tables (557-58) based on age, height, and sex Put your final data into the tables on p.563 “Pulmonary Measurements” and 564 “Calculated Pulmonary Capacities.” Answer the 3 questions after the table on p.564 For minute respiratory volume (MRV) and IRV, read your lab manual to determine how to calculate these values. VC = TV+ IRV + ERV

Assignment Pages with data Pages 563, 564 with data entered into 2 tables titled “Pulmonary Measurements” and “Calculated Pulmonary Capacities” and answers to the three questions on p. 564 Review Sheet numbers 1-13 ONLY on pages Due next Thurs