19. The smallest branches of the bronchial tree are: a) primary bronchi b) secondary bronchi c) tertiary bronchi d) bronchioles. 20. The function of surfactant is to: a) transport... 19. The smallest branches of the bronchial tree are: a) primary bronchi b) secondary bronchi c) tertiary bronchi d) bronchioles. 20. The function of surfactant is to: a) transport oxygen from the air to the blood b) transport carbon dioxide from the blood to the air c) prevent each alveolus from collapsing as air moves in and out during respiration d) trap foreign particles as they enter the bronchial tree. 21. The total number of lobes in both lungs is: a) 6 b) 5 c) 4 d) 3.
Understand the Problem
The question is asking about specific aspects of human anatomy related to the bronchial tree, surfactant function, and lung lobes, likely in a quiz or exam format. The questions require identification of correct terms and functions related to respiratory physiology.
Answer
19. bronchioles; 20. prevent each alveolus from collapsing; 21. 5
- bronchioles; 20. prevent each alveolus from collapsing as air moves in and out during respiration; 21. 5
Answer for screen readers
- bronchioles; 20. prevent each alveolus from collapsing as air moves in and out during respiration; 21. 5
More Information
Bronchioles are the smallest air passages within the lungs, terminally ending the conducting zone. Surfactant decreases surface tension, preventing alveolar collapse. Humans have five lung lobes: three in the right lung and two in the left.
Tips
Common mistakes include confusing bronchioles with bronchi or misunderstandings about lobes and surfactant roles. Always double-check anatomical references.
Sources
- Anatomy, Thorax, Bronchial - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
- Bronchi, Bronchial Tree, & Lungs - SEER Training Modules - training.seer.cancer.gov
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