PhysioEx Exercise 7 Activity 1
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PhysioEx Exercise 7 Activity 1
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PhysioEx Lab Report
Exercise 7: Respiratory System Mechanics
Activity 1: Measuring Respiratory Volumes and Calculating Capacities
Name: melinda halapi
Date: 15 February 2024
Session ID: session-4e998737-b77d-0b2f-75ef-f48555b9f621
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
Experiment Results
Predict Question
Which of the following statements describing the mechanics of breathing is false
?
You correctly answered: Ventilation relies exclusively on contracting skeletal muscles.
1
The contraction of which of the following muscles will increase the thoracic cavity volume
during inspiration?
You correctly answered: the external intercostals.
2
At the beginning of inspiration, the
You correctly answered: thoracic cavity volume increases.
3
At the beginning of expiration, the
You correctly answered: pressure in the thoracic cavity increases.
4
A tidal volume refers to the
You correctly answered: amount of air inspired and then expired with each breath under
resting conditions.
5
Predict Question: Lung diseases are often classified as obstructive or restrictive. An
obstructive
disease affects airflow
, and a restrictive
disease usually reduces volumes and
capacities
. Although they are not diagnostic, pulmonary function tests such as forced
expiratory volume
(FEV
) can help a clinician determine the difference between obstructive
and restrictive diseases. Specifically, an
FEV
is the forced volume expired in 1 second.
1
1
1
2/15/24, 10:24 PM
PhysioEx Exercise 7 Activity 1
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2/5
Stop & Think Questions
Experiment Data
Radius
(mm)
Flow
(ml/min)
TV (ml)
ERV
(ml)
IRV
(ml)
RV
(ml)
VC
(ml)
FEV
(ml)
TLC
(ml)
BPM
5.00
7485
499
----
---
---
---
---
---
15
5.00
7500
500
1200
3091
1200
4791
3541
5991
15
4.50
4920
328
787
2028
1613
3143
2303
4756
15
4.00
3075
205
492
1266
1908
1962
1422
3871
15
3.50
1800
120
288
742
2112
1150
822
3262
15
3.00
975
65
156
401
2244
621
436
2865
15
In obstructive diseases such as chronic bronchitis and asthma, airway radius is decreased.
Thus,
FEV
will
Your answer: decrease proportionately.
1
Which muscles contract during quiet expiration?
You correctly answered: none of these muscles contract during quiet expiration.
1
Minute ventilation
is the amount of air that flows into and then out of the lungs in a
minute. Minute ventilation (ml/min) = TV (ml/breath) x BPM (breaths/min).
Using the values from the second recorded measurement, enter the minute ventilation.
You answered: 7500 ml/min.
2
A useful way to express FEV
is as a percentage of the forced vital capacity (FVC). Using the
FEV
and FVC values from the data grid, calculate the FEV
(%) by dividing the FEV
volume by
the FVC volume (in this case, the VC is equal to the FVC) and multiply by 100%.
Enter the FEV
(%) for an airway radius of 5.00 mm.
You answered: 74 %.
3
1
1
1
1
1
A useful way to express FEV
is as a percentage of the forced vital capacity (FVC). Using the
FEV
and FVC values from the data grid, calculate the FEV
(%) by dividing the FEV
volume by
the FVC volume (in this case, the VC is equal to the FVC) and multiply by 100%.
Enter the FEV
(%) for an airway radius of 3.00 mm.
You answered: 70 %.
4
1
1
1
1
1
1
2/15/24, 10:24 PM
PhysioEx Exercise 7 Activity 1
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Baseline
Airway radius = 5.00 mm
Airway radius = 4.50 mm
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2/15/24, 10:24 PM
PhysioEx Exercise 7 Activity 1
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Airway radius = 4.00 mm
Airway radius = 3.50 mm
Airway radius = 3.00 mm
2/15/24, 10:24 PM
PhysioEx Exercise 7 Activity 1
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex7/act1/
5/5
Post-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
Review Sheet Results
You have not completed the Review Sheet.
To calculate a person's vital capacity, you need to know the TV, ERV, and
You correctly answered: IRV.
1
Measuring a person's FVC means that you are measuring
You correctly answered: the amount of air that can be expelled when the subject takes the
deepest possible inspiration and then forcefully expires as completely and rapidly as
possible.
2
Measuring a person's FEV
means that you are measuring
You correctly answered: the amount of the VC that is expired during the first second of the
FVC test.
3
1
For a person suffering an asthma attack, inhaler medications are expected to
You correctly answered: reduce the airway resistance.
4
Which of the following values does not
include the ERV?
You correctly answered: TV.
5
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