Author Question: Which of the following can impair or inhibit ciliary activity? 1. Drying of the respiratory tract ... (Read 46 times)

maegan_martin · **on:** Jul 16, 2018

Which of the following can impair or inhibit ciliary activity? 1. Drying of the respiratory tract mucosa 2. Exposure to smoke 3. Parasympatholytic drugs

a. 1 and 2 only
b. 1 only
c. 1, 2, and 3
d. 2 and 3 only

Question 2

What is the name given to the action produced by the forward stroking of millions of cilia?

a. Coughing
b. Mucociliary escalator
c. Mucus stroking
d. The wave

al · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Ciliary beating can be effectively slowed or even stopped if the viscosity of the sol layer is in-creased by exposure to dry gas. Ciliary motion is also stopped following exposure to smoke, high concentrations of inhaled O2, and drugs like atropine.

Answer to Question 2

ANS: B
The stroking action of millions of cilia propels the surrounding mucus at a speed approximately 2 cm/min. This action is commonly referred to as the mucociliary escalator.