ATI TEAS (Test of Essential Academic Skills) Version 7ScienceMedium
A patient presents with symptoms including chronic cough, wheezing, and shortness of breath, particularly during exertion. Diagnostic imaging reveals inflammation and narrowing of the small airways within the lungs. Which of the following respiratory structures is primarily affected?
- ABronchioles
- BTrachea
- CBronchi
- DAlveoli
Show answer & explanationAnswer & explanation
Correct answer: A. Bronchioles
The bronchioles are the small airways within the lungs that branch off from the bronchi. Inflammation and narrowing of these structures, as described by 'small airways,' directly lead to symptoms like wheezing and shortness of breath, characteristic of conditions like asthma or bronchitis.
Why the other options are wrong
- B. The trachea is the main windpipe; inflammation here would cause a different set of symptoms, primarily upper airway obstruction.
- C. Bronchi are larger airways; while they can be inflamed, the description 'small airways' points to bronchioles.
- D. Alveoli are air sacs where gas exchange occurs; their primary pathology would involve impaired gas exchange, not necessarily wheezing from airway narrowing.
Bronchioles
Smallest airways in the lungs that branch off from the bronchi and lead to the alveolar ducts and alveoli.
- Lack cartilage support.
- Regulate airflow to alveoli via smooth muscle contraction/relaxation.
- Primary site of resistance in the lower respiratory tract.
Memory trick: Bronchioles are the 'tiny branches' of the lung tree.