Kartagener's syndrome, characterized by frequent respiratory infections, arises from a defect in which respiratory structure?
a. Cartilage in bronchi
b. Cilia in respiratory epithelia
c. Goblet cells in bronchioles
d. Pulmonary alveolar capillaries
e. Surfactant in alveolar cells
ANS: B
Kartagener's syndrome is caused by a defective type of dynein in epithelial cilia that makes them nonmotile.
You might also like to view...
As the result of an asthmatic attack,
A. pulmonary blood flow is reduced while ventilation remains normal. B. ventilation exceeds the ability of blood to pick up oxygen. C. the surface area available for gas exchange increases. D. bronchioles dilate. E. ventilation is inadequate to oxygenate blood.
What are four possible complications of obesity from a medical standpoint?
What will be an ideal response
In the lab you are re-creating the metabolic pathway that produces the hormone testosterone. Unfortunately, you've run out of the enzyme that catalyzes the third reaction. It's no problem, though, because you can substitute any of the other enzymes as all enzymes in a metabolic pathway are interchangeable.
Answer the following statement true (T) or false (F)
An incoming pathway for subconscious information derived from the stomach is called a(n) ____________________ afferent, whereas an incoming pathway for information propagated to the conscious levels of the brain is called a(n) ____________________ afferent
Fill in the blank(s) with correct word