QuestionSBA
QuestionChoice
The biggest factor contributing to airway resistance is airway diameter, with narrower airways typically having greater airway resistance. The trachea contributes the most to total airway resistance. Individually, the smaller airways contribute more to airway resistance than the trachea, however, the branching of the airway system results in lots of smaller airways in parallel. When you consider the flow through these smaller airways as a whole, the total resistance is less than that of the trachea.
10003896
a
Trachea
QuestionChoice
The trachea contributes the most to total airway resistance. Individually, the smaller airways contribute more to airway resistance than the trachea, however, the branching of the airway system results in lots of smaller airways in parallel. When you consider the flow through these smaller airways as a whole, the total resistance is less than that of the trachea.
10003900
e
Segmental bronchi
QuestionChoice
The trachea contributes the most to total airway resistance. Individually, the smaller airways contribute more to airway resistance than the trachea, however, the branching of the airway system results in lots of smaller airways in parallel. When you consider the flow through these smaller airways as a whole, the total resistance is less than that of the trachea.
10003898
c
Alveoli
QuestionChoice
The trachea contributes the most to total airway resistance. Individually, the smaller airways contribute more to airway resistance than the trachea, however, the branching of the airway system results in lots of smaller airways in parallel. When you consider the flow through these smaller airways as a whole, the total resistance is less than that of the trachea. Most airway diseases affect the bronchioles first, and as bronchioles don't contribute much towards airway resistance, their resistance can increase a lot before the total resistance of the respiratory tract is affected.
10003897
b
Bronchioles
QuestionChoice
The trachea contributes the most to total airway resistance. Individually, the smaller airways contribute more to airway resistance than the trachea, however, the branching of the airway system results in lots of smaller airways in parallel. When you consider the flow through these smaller airways as a whole, the total resistance is less than that of the trachea.
10003899
d
Alveolar ducts
Concept
Chapter
2693
4214
Sites of airway resistance
Topic
150
Respiratory physiology
13326
A 32-year-old male attends the Emergency Department with a severe asthma exacerbation. He is dyspnoeic and wheezy and unable to complete full sentences.

Which of the following parts of the respiratory tract provides the most total resistance to airflow?
a