Identify the most common lethal inherited disease affecting Caucasians of Northern European descent that results from a defective gene located on chromosome 7.
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.
In this procedure, an incision is made through the anterior tracheal wall and a tube is inserted.
The function of the nasal conchae is to
A)divide the nasal cavity into a right and a left side.
B)provide an opening into the pharynx.
C)provide a surface for gas exchange.
D)create turbulence in the air to trap small particles in mucus.
E)provide an opening to the outside of the body.