What happens to the number of goblet cells found in the walls of the respiratory tract as it moves down from the upper conducting zone to the lower respiratory zone?
A) changes to ciliated pseudostratified epithelium
B) decreases
C) increases
D) thickens
E) no change
Ans: B) decreases
You might also like to view...
Which of the following type of organism is most likely an autotroph?
A. caribou B. lion C. human D. tree E. parasite
Botulinum antitoxin produced in a horse and given to a human suffering from botulism food poisoning is an example of
A. naturally acquired passive immunity. B. naturally acquired active immunity. C. artificially acquired passive immunity. D. artificially acquired active immunity.
Name the two strategic methods that scientists are using to sequence genomes
What will be an ideal response?
Please choose the hepatitis virus that is primarily spread through sexual contact.
A) HAV B) HBV C) HCV D) All of these choices are correct