Multiple Choice
Which statement characterizes mucus in the mammalian respiratory system?
A) The mucus escalator interferes with gas exchange.
B) It improves perfusion.
C) It clogs the respiratory tract when smoking over-stimulates ciliary action.
D) It is swept by downward beating cilia to the stomach for digesting.
E) It captures inhaled dirt and microorganisms.
Correct Answer:
Verified
Correct Answer:
Verified
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