People suffering from bronchitis cough
excessively because
a. excess bronchial mucus is produced.
b. not enough bronchial mucus is produced.
c. cilia that line the bronchial tubes are nonfunctional.
d. cilia that line the bronchial tubes are
hyperactive.
e. of more than one of these
A
You might also like to view...
Cells take in and get rid of substances in various ways. Which process requires the expenditure of energy?
A) passive transport B) diffusion C) active transport D) osmosis
Guard cells control the opening and closing of plant stomata by creating osmotic gradients across their membranes, which are adjusted by regulating the concentration of ________ in their cytoplasm
Fill in the blank(s) with correct word
Insects have compound eyes that are highly sensitive to _______________.
Fill in the blank(s) with the appropriate word(s).
Which of the following items that are commonly added during food preparation can be considered a preservative?
A. apple juice B. meat broth C. garlic D. yeast E. whey