¡Descarga Informe de laboratorio de PhysioEx: Mecánica del Sistema Respiratorio (Ejercicio 7) y más Guías, Proyectos, Investigaciones en PDF de Fisiología solo en Docsity!
PhysioEx Lab Report
Exercise 7 : Respiratory System Mechanics
Activity 1 : Measuring Respiratory Volumes and Calculating Capacities Name: Daniela Carolina Hurtado Costa
Date: 4 April 2022 Session ID: session-436797eb-c60e-d7ed-68d5-c2562d47061e
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.
The contraction of which of the following muscles will increase the thoracic cavity volume during inspiration? You correctly answered: the external intercostals.
At the beginning of inspiration, the You correctly answered: thoracic cavity volume increases.
At the beginning of expiration, the You correctly answered: pressure in the thoracic cavity increases.
A tidal volume refers to the You correctly answered: amount of air inspired and then expired with each breath under resting conditions.
Predict Question: Lung diseases are often classified as obstructive or restrictive. An obstructive disease affects airflow, and a restrictive disease usually reduces
Stop & Think Questions
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.
In obstructive diseases such as chronic bronchitis and asthma, airway radius is decreased. Thus, FEV will Your answer: decrease proportionately.
1 1
1
Which muscles contract during quiet expiration? You correctly answered: none of these muscles contract during quiet expiration.
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.
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 %.
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: 70.2 %.
1 1 1
1
Airway radius = 4.00 mm
Airway radius = 3.50 mm
Airway radius = 3.00 mm
Post-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
Review Sheet Results
To calculate a person's vital capacity, you need to know the TV, ERV, and You correctly answered: IRV.
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.
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.
For a person suffering an asthma attack, inhaler medications are expected to You correctly answered: reduce the airway resistance.
Which of the following values does not include the ERV? You correctly answered: TV.
What would be an example of an everyday respiratory event the ERV simulates? Your answer: Un ejemplo de un evento de respiración diario es Uno de los casos que se puede mencionar es cuando se levanta mucho peso.
What additional skeletal muscles are utilized in an ERV activity? Your answer: Músculos de la pared abdominal anterior.
3 What was the FEV 1 (%) at the initial radius of 5.00 mm?
