21. The Immune System
Physical Barriers in First-Line Defenses: Mucous Membrane
Multiple Choice
Multiple ChoiceWhich physical, nonspecific host defense mechanism is associated with the respiratory tract and trachea?
A
Water-repelling keratin proteins.
B
Lysozyme enzymes.
C
Mucociliary escalator.
D
Salivary amylase.
47
views
1
rank
Related Videos
Related Practice
Showing 1 of 9 videos