What is the cause of reduced clearance of respiratory secretions that predisposes people to respiratory infections?

Question

Quizplus · Accepted Answer

In addition to age as a compromising factor, reduced clearance of secretions or obstruction of an area in either the upper or the lower respiratory tract predisposes to infection and can, on occasion, seriously compromise respiratory tract function.Decreased clearance of respiratory secretions may result from the following: immature anatomic development, transient reduction in function of the mucociliary mechanism, obstruction by a foreign body, previous disease that alters the normal respiratory tract anatomy, and alterations in the viscosity of mucus.

What Is the Cause of Reduced Clearance of Respiratory Secretions