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What structure in the region of the lungs where the majority of gas exchange occurs?
a. terminal
b. bronchiole alveolus
c. alveolar duct
d. respiratory
e. bronchiole
f. bronchus

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tutorAnne

Answer: bronchiole alveolus----b

Explanation:

The  bronchioles alveolus are the region in the lungs where the majority of gas exchange occurs. Now the bronchioles are the  air passages inside the lungs which are responsible for the air flow from the windpipe after inhalation. These bronchioles then delivers the air into the tiny sacs of the alveoli  where  the exchange of carbon dioxide  and oxygen takes place  after which carbon dioxide goes out out of the alveoli during exhalation.

adefioyelaoye

Answer:

b. bronchiole alveolus

Explanation:

The lungs is the major organ for respiration. The lungs contain cells and tissues which aid gaseous exchange. The alveolus(plural:alveoli) is the major structure in which gaseous exchange takes place.

The option lacks alveoli and it is understood that very little gaseous exchange takes place in the alveolar duct then we choose bronchiole alveolus since the alveoli are formed by branching out from the bronchiole.

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