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BIOC34H3 Lecture Notes - Asthma, Electronvolt, Obstructive Lung Disease

Biological Sciences
Course Code
Stephen Reid

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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.
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)
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.

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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
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
Students should provide the 5 values listed above. These are the correct values. Just cutting and
pasting the table isn’t sufficient. (1 mark)

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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).
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