In this lab, you'll explore respiratory physiology. First you'll learn about spirometry and the clinically useful lung volumes and capacities. Then you'll do an activity that demonstrates the role of
(remote 2020)
Respiratory Lab Activity 1: Vital Capacity and %FEV1
After analyzing Figure 3 on the Activity 1 page on Canvas, answer the following questions 1-3.
Determine the patient’s actual vital capacity from the spirogram. Then calculate and analyze the patient’s % predicted vital capacity if the patient’s predicted vital capacity is 5200 ml.
Actual vital capacity: Click or tap here to enter text. ml
% predicted vital capacity: Click or tap here to enter text.
Should the patient be concerned based on their % predicted value? Why or why not?
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Determine the patient’s FEV1 from the spirogram and then calculate and analyze the %FEV1.
FEV1: Click or tap here to enter text. ml
%FEV1: Click or tap here to enter text.
What does the %FEV1 suggest for this patient?
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If someone’s actual vital capacity is greater than their predicted vital capacity, should they be concerned? Consider multiple possibilities and explain your response.
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Roberta’s vital capacity is quite a bit lower than 80% predicted. What might this suggest?
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Males generally have greater lung volumes and capacities than females. Why? Find and cite a credible source.
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As we age, our vital capacity tends to decrease. Why? Find and cite a credible source.
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Hypothesis: BEFORE you begin! Form a hypothesis about whether you will be able to hold your breath longer following eupnea or hyperventilation? Provide a justification for your hypothesis. Hint: consider CO2 levels for each condition.
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Complete the table.
| Time of breath-holding following eupnea | Time of breath-holding following hyperventilation | |
| Trial 1 | ||
| Trial 2 | ||
| Trial 3 | ||
| Average |
Did the data for your experiment support your hypothesis? If the results are unusual, also explain what should have happened.
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Explain IN DETAIL the negative feedback mechanism that was occurring in your body that lead to you needing to finally take a breath after having held your breath. Include the stimulus, sensor, afferent path, integrating center, efferent path, effector and response, and briefly explain the role of each as well as the overall impact of the response.
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