Scelta multipla
Which of the following is not an example of a portal of entry for microorganisms?
310
views
21. The Immune System
Introduction to First-Line Defenses
Scelta multipla
How do cilia function as a first-line defense to prevent infection?
A
Cilia increase the acidity of the skin to inhibit pathogen growth.
B
Cilia secrete enzymes that digest pathogens.
C
Cilia produce antibodies to neutralize pathogens.
D
Cilia trap and move pathogens out of the respiratory tract.
Guida verificata passo dopo passo1
Understand the role of cilia in the respiratory system: Cilia are tiny hair-like structures that line the respiratory tract, including the nasal passages, trachea, and bronchi.
Recognize the function of cilia: Cilia work in conjunction with mucus to trap inhaled particles, such as dust, bacteria, and viruses, preventing them from reaching the lungs.
Learn about the movement of cilia: Cilia beat in a coordinated, wave-like motion, moving the trapped particles upwards towards the throat where they can be swallowed or expelled.
Differentiate cilia from other defense mechanisms: Unlike acidity, enzymes, or antibodies, cilia do not chemically alter pathogens but physically move them out of the respiratory tract.
Conclude the primary defense mechanism: Cilia act as a mechanical barrier, effectively trapping and moving pathogens out of the respiratory tract to prevent infection.
Video correlati
Pratica correlata
