What sweeps foreign debris from the lower respiratory passages?
A)microvilli
B)gap junctions
C)flagella
D)cilia

Question

Quizplus · Accepted Answer

Cilia are hair-like structures present in the respiratory tract that sweep foreign debris towards the pharynx to be coughed out or swallowed. This is called the mucociliary escalator and is an important defense mechanism of the respiratory system. Microvilli are present in other areas of the body and are involved in absorption and secretion. Gap junctions are structures that allow communication between adjacent cells. Flagella are present in some cells, particularly sperm cells, and are involved in movement.

What Sweeps Foreign Debris from the Lower Respiratory Passages