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BIOC34H3 (114)
Lecture

physio ex lab

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Department
Biological Sciences
Course
BIOC34H3
Professor
Stephen Reid
Semester
Summer

Description
1 BGYC34; Third Assignment Marking Scheme (2010) PhysioEx Lab 7 (Respiratory System Mechanics) Due Date: Thursday February 25; 5:00PM. Perform the experiments in PhysioEx lab 7 (Respiratory System Dynamics) and submit a lab report according to the format and instructions below. There are a total of 25 marks. Introduction Write a brief (no more than 100 words) introduction that describes the goal of the experiments performed in this lab. (2 marks) Check the introduction to ensure that something has been written about the goals of the experiment and give the 2 marks. If this section is really short (i.e., just a single sentence) give only 1 mark. I have seen one paper that didn’t include an introduction at all (i.e., 0 marks) Methods Write a brief (no more than 300 words) methods section that describes the experiments performed in this lab. Describe the experimental preparation and the various manipulations that were performed. (2 marks) Check this section to see if it is a reasonable description of the experiments. If so, then give full marks. Reduce marks if you think the students have put no effort into this section or if it really short and uninformative. 2 Results RESPIRATORY VOLUMES GENERAL NOTE: Students were asked to provide figure and table legends which really just amount to a title. If they aren’t doing this then take off 2 marks overall. Activity 2: Measuring Normal Respiratory Volumes Provide the appropriate graph from this section (illustrated below). Provide an appropriate figure legend (title). Report the following variables that you recorded in this section: breathing frequency, tidal volume, minute respiratory volume (i.e., minute ventilation), inspiratory time and expiratory time. Figure Legend: Breathing trace illustrating expiratory reserve volume (ERV) and forced vital capacity FVC). Breathing frequency (pump rate) = 15 breaths per minute Tidal volume (TV) = 500 ml Minute ventilation (flow) = frequency X TV = 15 breaths/min X 500 ml = 7.5 litres/min Inspiratory time = 2 seconds Expiratory time = 2 seconds Students should provide a graph such as the one above showing a trace with ERV and FVC on them. Students should provide the 5 values listed above. These are the correct values. Just cutting and pasting the table isn’t sufficient. (1 mark) 3 Activity 3: Effect of Restricted Air Flow on Respiratory Volumes Include the following two tables and provide appropriate figure legends (title). Table Legend: The Effects of Altering Air Flow on Respiratory Volumes Table Legend: The Effect of Altering Air Flow on FEV1 and Forced Vital Capacity Give 2 marks for providing both tables (1 mark for each). The values need to be correct (the same as above or very close to the values above). 4 FACTORS AFFECTING RESPIRATION Activity 4: Effect of Surfactant on Respiratory Volumes Include the following graph and table. The graph should show breathing traces before and after the addition of surfactant. The data should show the data before and after the addition of surfactant. Provide appropriate figure and table legends (title). Figure Legend: A breathing trace with and without surfactant. Table Legend: The effect of adding pulmonary surfactant on respiratory volumes. Give 2 marks if both the trance and the table are there and look like the trace, and contain the data, seen above. 5 Activity 5: Effect of Thoracic Cavity Puncture Include the following graph and table. The graph should show breathing traces before and after the deflation of the left lung (i.e., the simulated pneumothorax). The data should show the data before and after the opening of the valve (i.e., puncturing of the lung). Figure Legend: Breathing traces before (upper) and after (lower) lung simulated lung puncture. Table Legend: The effects of left lung puncture on breathing. Give 2 marks if both the trance and the table are there and look like the trace, and contain the data, seen above. 6 VARIATIONS IN BREATHING Activities 6-8: Rapid Breathing, Rebreathing and Breath Holding Include a graph for each of the experiments (showing the control trace and the experimental trace) and the summary table. Figure Legend: Breathing traces before and after rapid breathing (left trace), Rebreathing (middle trace
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