The palatine tonsils lie in the lateral walls of the
The respiratory surfaces of the nasal cavity are cleared by mucus produced in part by which of the following?
Harry suffers from cystic fibrosis and frequently has periods where he can hardly breathe. The problem is most likely the result of
A)inflammation of the bronchi.
B)constriction of the trachea.
C)thick secretions that exceed the ability of the respiratory tract cilia to remove them.
D)laryngeal spasms that occur in response to a toxic substance produced by the epithelial cells.
E)collapse of one or both lungs.
Identify the most common lethal inherited disease affecting Caucasians of Northern European descent that results from a defective gene located on chromosome 7.