56 Questions
What does compliance of lung refer to?
The ease of inflating the lung
How can a lung be classified as compliant?
When it is inflated with little force
What happens if a lung is inflated with too much force?
It becomes uncompliant
What is the relationship between inflation force and lung compliance?
Inverse relationship
Why is lung compliance important?
For proper breathing function
What variable is typically represented on the x-axis in a lung pressure-volume graph?
Pressure
In the context of measuring lung volume, which variable is considered the dependent variable?
Volume
How is the change in lung volume denoted in relation to a change in pressure in lung studies?
$\Delta V$
Which of the following variables increases when the airway expands in lung studies?
Volume
Why is it important to put the independent variable on the x-axis and the dependent variable on the y-axis in lung pressure-volume graphs?
To follow standard graphing conventions
What is the wise approach when inflating a partially inflated lung with high compliance?
Apply little force and avoid too much change in volume
Why is it not wise to inflate a totally inflated lung?
The deflation curve differs from the inflation curve
Which curve do we consider when determining lung compliance?
Deflation curve
How is the respiratory system described in terms of balloons?
Two balloons - lung and thorax
What does hysteresis refer to in the context of lung inflation?
Difference between forward and backward process during deflation
Compared to functional residual capacity (FRC), what will be the tendency of the thorax to expand?
Contract
What will be the tendency of the lung-thorax system?
Increase
How does the thorax respond in relation to FRC?
Twist
What happens to the thorax's tendency compared to FRC?
Accelerate
In relation to functional residual capacity (FRC), what does the lung-thorax system do?
Tense up
What is the primary purpose of increasing FRC as mentioned in the text?
To decrease the tendency to collapse of lung
How does increasing FRC affect the tendency to collapse of the lung?
It reduces the tendency of lung collapse
What might happen if the FRC is not increased as suggested in the text?
Decreased lung compliance
Which of the following is NOT a reason for increasing FRC according to the text?
To improve lung compliance
In the context of lung physiology, what does FRC stand for?
Functional Respiratory Capacity
At functional residual capacity in a normal male adult, which of the following is true regarding the lung volume?
It is the volume of air left in the lungs after a normal exhalation.
What is the primary function of increasing functional residual capacity as discussed in the text?
To prevent lung collapse
How is the relationship between inflation force and lung compliance best described?
Inflation force and lung compliance are inversely related.
In lung physiology, what does FRC stand for?
Functional Residual Capacity
Which variable typically increases when the airway expands in lung studies?
Lung Compliance
What happens to lung compliance when the thorax expands beyond functional residual capacity?
Lung compliance decreases
If the pressure in the box is 760 mmHg, according to Boyle's law, what will happen to the pressure if the volume is decreased?
The pressure will increase
What is the potential consequence of inflating a totally deflated lung, as mentioned in the text?
Increased ATP production
How does increasing the volume affect pressure according to Boyle's law?
Pressure decreases
Why should ATP levels not exceed 2% when inflating a totally deflated lung?
To reduce the workload on the lungs
What distinguishes the resting volume from the residual volume of the lung, as per the text?
Amount of air remaining in the lungs
What is the direct relationship between volume and pressure according to Boyle's law?
Inverse
Why is it cautioned against inflating a totally deflated lung, leading to excessive effort and ATP usage?
To avoid excessive ATP consumption
If the volume in the box increases, what effect does this have on the pressure based on Boyle's law?
Pressure decreases
What key factor contributes to making it unwise to inflate a totally deflated lung?
Elevated hysteresis levels
How does Boyle's law explain the relationship between volume and pressure when applied to a closed box?
They are inversely proportional
What is the significance of considering the deflation curve rather than the inflation curve when determining lung compliance?
It provides a more accurate measure of lung compliance
Why do we refer to the lung as having high compliance when partially inflated?
To prevent excessive changes in lung volume
What is the implication of hysteresis in the lung-thorax system during deflation?
It signifies a difference between forward and backward processes
How is the respiratory system described in terms of balloons according to the text?
A system with an internal lung balloon and an external thorax balloon
What is the approximate compliance of the lung as mentioned in the text?
$300ml/1cmH2O$
What proportion of lung collapse is attributed to surface tension according to the text?
Two thirds
Which factor accounts for one third of lung collapse based on the information provided?
Elastic fibers
In the context of lung physiology, what does FRC specifically stand for?
Functional Respiratory Capacity
What is the primary role of surface tension in the context of lung physiology?
Preventing lung overexpansion
Which component of the lung-thorax system primarily contributes to the elastic properties of the lungs?
Elastic fibers
What is the most likely disorder that the man has based on the text?
Pulmonary fibrosis
Which lung disorder is characterized by irreversible scarring of lung tissue?
Asbestosis
Which lung condition is typically associated with long-term smoking?
Emphysema
Which disease is characterized by the inflammation and narrowing of the airways?
Bronchitis
Which lung disorder involves the abnormal accumulation of air in the lungs' alveoli, leading to decreased lung function?
Pneumothorax
Test your knowledge on lung compliance and the process of inflating lungs. Understand the concept of how easy it is to inflate the lungs and what determines compliant and uncompliant lungs.
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