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WorksheetsRespiratory Physiology Quiz
Total questions: 15
Worksheet time: 8mins
What is the tidal volume (VT)?
The volume remaining in the lungs after maximal expiration
The volume that can be inspired over the tidal volume
The volume that can be expired after a tidal volume
The volume inspired or expired with each normal breath
Which lung volume cannot be measured by spirometry?
Residual volume (RV)
Tidal volume (VT)
Inspiratory reserve volume (IRV)
Expiratory reserve volume (ERV)
What is the equation for calculating physiologic dead space (VD)?
VD = (VT - VD) × breaths/min
VD = VT × breaths/min
VD = VT + ERV
VD = VT × (PaCO2 - PeCO2) / PaCO2
What is the functional residual capacity (FRC)?
The sum of tidal volume, inspiratory reserve volume, and expiratory reserve volume
The volume in the lungs after a maximal inspiration
The volume remaining in the lungs after a tidal volume is expired
The sum of tidal volume and inspiratory reserve volume
In obstructive lung disease, what happens to FEV1/FVC ratio?
It increases
It decreases
It remains the same
It becomes zero
What is the primary muscle for inspiration?
External intercostals
Internal intercostals
Abdominal muscles
Diaphragm
What does compliance of the respiratory system describe?
The ability to resist airflow
The change in volume for a given change in pressure
The total lung capacity
The volume of air that can be forcibly expired
What is the effect of surfactant on alveoli?
Increases surface tension
Decreases compliance
Prevents small alveoli from collapsing
Increases collapsing pressure
What is the primary site of airway resistance?
Trachea
Medium-sized bronchi
Smallest airways
Alveoli
What happens to intrapleural pressure during inspiration?
It becomes positive
It remains the same
It becomes more negative
It increases slightly
What is the primary form of oxygen transport in blood?
As carbon dioxide
Bound to hemoglobin
In the form of bicarbonate
Dissolved in plasma
What is the effect of high lung volumes on airway resistance?
Causes airway collapse
Decreases resistance
Has no effect
Increases resistance
What is the relationship between pressure and airflow?
Airflow is inversely proportional to pressure difference
Airflow is directly proportional to pressure difference
Airflow is independent of pressure
Airflow is proportional to airway resistance
What is the primary characteristic of restrictive lung disease?
Air trapping
Increased FEV1/FVC ratio
Decreased lung compliance
Increased lung compliance
What is the primary role of hemoglobin in oxygen transport?
To bind and carry oxygen
To dissolve oxygen in plasma
To increase blood viscosity
To convert oxygen to carbon dioxide
