What is the primary anatomical difference that marks the dividing line between the conducting zone and the respiratory zone of the respiratory tract?
A) the absence of goblet cells
B) the thickness of the walls surrounding the air spaces
C) the absence of cartilage
D) the presence of macrophages
E) the presence of smooth muscle and the absence of cartilage
Correct Answer:
Verified
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Q66: Q67: What is the term for the volume Q68: Which of the following is responsible for Q69: What happens to the amount of cartilage Q71: What benefit are corticosteroids in the treatment Q72: The maximum volume of air that can Q73: What happens to the number of goblet Q74: What happens to the amount of smooth Q75: Which cells form the mucus escalator?
A)ciliated cells
B)type
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