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Physical Barriers in First-Line Defenses: Mucous Membrane
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Physical Barriers in First-Line Defenses: Mucous Membrane
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21. The Immune System / Physical Barriers in First-Line Defenses: Mucous Membrane / Problem 4
Problem 4
Which mechanism describes how the mucociliary escalator functions in the respiratory tract?
A
Cilia beat in a coordinated manner to move mucus and trapped particles towards the pharynx
B
Mucus membranes absorb pathogens
C
Goblet cells directly destroy pathogens
D
Peristalsis pushes mucus upwards
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