Question

Which statement is not true of cilia in the respiratory tract?

A. They help clean the respiratory system.
B. They are thin structures that resemble hairs.
C. They close the windpipe opening when swallowing.
D. They move mucus from the bronchi to the pharynx.

Answer 1

The answer is letter C.They close the windpipe opening when swallowing. This function is done by the epiglottis. It keeps the windpipe safe by closing it and trackingthat the food comes in the right pipe which is the pharynx that is connected to the esophagus.

Answer 2

This statement is not true of cilia in the respiratory tract: THEY CLOSE THE WIND PIPE OPENING WHEN SWALLOWING.
Respiratory cilia are hair like structures that are find in the respiratory tract. Their major function is filtration of air for removal of contaminants. They are also capable of removing foreign objects such as smoke, dust and inhaled particles such as pollen from the respiratory system. Another functions perform by the cilia is the movement of mucus away from the lungs into the throat thus helping to protect the lungs from infection.
The closing of wind pipe when swallowing is not part of the functions of the cilia, that role is performed by the epiglottis.