RESPIRATORY PHYSIOLOGY
QUESTION 2025 UPDATED
QUESTIONS WITH ACTUAL
ANSWERS ALREADY GRADED
The lung and chest wall have equal and opposite recoil tendencies at - CORRECT
ANSWER>>>>functional residual capacity
In an obstructive lung disorder, which of the following is likely to increase? - CORRECT
ANSWER>>>>Residual volume/total lung capacity
Which of the following pulmonary disorders is most likely to show a steep lung compliance
curve at functional residual capacity? - CORRECT ANSWER>>>>Alpha-antitrypsin
(antiprotease) deficiency (type of emphysema)
During normal quiet breathing at rest in a healthy individual, work is performed for breathing -
CORRECT ANSWER>>>>only during inspiration
Stiff (low compliance) lungs are a characteristic of IRDS because - CORRECT
ANSWER>>>>immature type II cells do not produce sufficient surfactant
Which volume describes vital capacity - CORRECT ANSWER>>>>inspiratory
capacity+expiratory reserve volume
Functional residual capacity - CORRECT ANSWER>>>>is determined by the elastic recoil
properties of the lung and chest wall
The increase in lung compliance produced by emphysema often results in - CORRECT
ANSWER>>>>an increase in the work of breathing during expiration
Pulmonary surfactant is important to normal respiratory function because it - CORRECT
ANSWER>>>>~slows the movement of water into alveoli
~prevents the collapse of small alveoli
~decreases the work of breathing
~increases the compliance of the lung
Functional residual capacity can be measured by a spirometer - CORRECT ANSWER>>>>False
A subject experiencing an asthma attack is relived by breathing 80% helium/20% oxygen. The
factor that is altered and responsible for relieving the dyspnea when breathing the helium/oxygen
mixture is - CORRECT ANSWER>>>>Reynold's number
, The lung volume achieved when the elastic recoil of the lung is equal and opposite to the elastic
recoil of the thoracic cage is called - CORRECT ANSWER>>>>functional residual capacity
Elastic recoil of the lungs - CORRECT ANSWER>>>>increases near total lung capacity
Normally, the diaphragm is pulled (arched) into the thoracic cage by elastic recoil of the lungs
during expiration. A Chets x-ray that revealed a flat diaphragm during expiration would suggest -
CORRECT ANSWER>>>>obstructive lung disease
Obstructive respiratory diseases are always associated with increased ____, and restrictive
respiratory diseases are always associated with decreased ____ - CORRECT
ANSWER>>>>resistance to airflow, lung compliance (respectively)
Patients with COPD can inspire faster than they can actively expire. The most reasonable
explanation fro this difference is that - CORRECT ANSWER>>>>thoracic airways tend to
collapse during strong expiratory efforts
This lung volume or capacity can be measured directly by a spirometer - CORRECT
ANSWER>>>>vital capacity
Dynamic compressions of the airways - CORRECT ANSWER>>>>does not affect airway
resistance during inspiration
A patient has been smoking 2-3 packs of cigarettes per day for the past 20 years and is presently
suffering from emphysema. Which of the following would not be likely - CORRECT
ANSWER>>>>increased anatomic dead space
The volume of air remaining in the lung after expiration of the vital capacity is - CORRECT
ANSWER>>>>residual volume
The lung volume which continues to increase normally with advancing age is - CORRECT
ANSWER>>>>residual volume, functional residual capacity, and total lung capacity
A patient with lung volumes and a diffusing capacity less than normal would most likely have: -
CORRECT ANSWER>>>>Interstitial lung disease
If a man is shot in the chest, causing a bilateral pneumothorax - CORRECT ANSWER>>>>his
lungs will collapse and his chest will expand
In a restrictive condition (pulmonary fibrosis), airway resistance is ___ and lung compliance is
_____. respectively - CORRECT ANSWER>>>>near normal; decreased
A lung with normal surfactant function, compared to a lung where no alveolar surfactant is
present, will exhibit - CORRECT ANSWER>>>>lung elastic recoil is decreased
QUESTION 2025 UPDATED
QUESTIONS WITH ACTUAL
ANSWERS ALREADY GRADED
The lung and chest wall have equal and opposite recoil tendencies at - CORRECT
ANSWER>>>>functional residual capacity
In an obstructive lung disorder, which of the following is likely to increase? - CORRECT
ANSWER>>>>Residual volume/total lung capacity
Which of the following pulmonary disorders is most likely to show a steep lung compliance
curve at functional residual capacity? - CORRECT ANSWER>>>>Alpha-antitrypsin
(antiprotease) deficiency (type of emphysema)
During normal quiet breathing at rest in a healthy individual, work is performed for breathing -
CORRECT ANSWER>>>>only during inspiration
Stiff (low compliance) lungs are a characteristic of IRDS because - CORRECT
ANSWER>>>>immature type II cells do not produce sufficient surfactant
Which volume describes vital capacity - CORRECT ANSWER>>>>inspiratory
capacity+expiratory reserve volume
Functional residual capacity - CORRECT ANSWER>>>>is determined by the elastic recoil
properties of the lung and chest wall
The increase in lung compliance produced by emphysema often results in - CORRECT
ANSWER>>>>an increase in the work of breathing during expiration
Pulmonary surfactant is important to normal respiratory function because it - CORRECT
ANSWER>>>>~slows the movement of water into alveoli
~prevents the collapse of small alveoli
~decreases the work of breathing
~increases the compliance of the lung
Functional residual capacity can be measured by a spirometer - CORRECT ANSWER>>>>False
A subject experiencing an asthma attack is relived by breathing 80% helium/20% oxygen. The
factor that is altered and responsible for relieving the dyspnea when breathing the helium/oxygen
mixture is - CORRECT ANSWER>>>>Reynold's number
, The lung volume achieved when the elastic recoil of the lung is equal and opposite to the elastic
recoil of the thoracic cage is called - CORRECT ANSWER>>>>functional residual capacity
Elastic recoil of the lungs - CORRECT ANSWER>>>>increases near total lung capacity
Normally, the diaphragm is pulled (arched) into the thoracic cage by elastic recoil of the lungs
during expiration. A Chets x-ray that revealed a flat diaphragm during expiration would suggest -
CORRECT ANSWER>>>>obstructive lung disease
Obstructive respiratory diseases are always associated with increased ____, and restrictive
respiratory diseases are always associated with decreased ____ - CORRECT
ANSWER>>>>resistance to airflow, lung compliance (respectively)
Patients with COPD can inspire faster than they can actively expire. The most reasonable
explanation fro this difference is that - CORRECT ANSWER>>>>thoracic airways tend to
collapse during strong expiratory efforts
This lung volume or capacity can be measured directly by a spirometer - CORRECT
ANSWER>>>>vital capacity
Dynamic compressions of the airways - CORRECT ANSWER>>>>does not affect airway
resistance during inspiration
A patient has been smoking 2-3 packs of cigarettes per day for the past 20 years and is presently
suffering from emphysema. Which of the following would not be likely - CORRECT
ANSWER>>>>increased anatomic dead space
The volume of air remaining in the lung after expiration of the vital capacity is - CORRECT
ANSWER>>>>residual volume
The lung volume which continues to increase normally with advancing age is - CORRECT
ANSWER>>>>residual volume, functional residual capacity, and total lung capacity
A patient with lung volumes and a diffusing capacity less than normal would most likely have: -
CORRECT ANSWER>>>>Interstitial lung disease
If a man is shot in the chest, causing a bilateral pneumothorax - CORRECT ANSWER>>>>his
lungs will collapse and his chest will expand
In a restrictive condition (pulmonary fibrosis), airway resistance is ___ and lung compliance is
_____. respectively - CORRECT ANSWER>>>>near normal; decreased
A lung with normal surfactant function, compared to a lung where no alveolar surfactant is
present, will exhibit - CORRECT ANSWER>>>>lung elastic recoil is decreased
