What happens to the amount of cartilage in the walls of the respiratory tract as it moves down from the upper conducting zone to the lower respiratory zone?
A) decreases
B) no change
C) thickens
D) increases
E) hypertrophies
Ans: A) decreases
You might also like to view...
How did Darwin refer to changes in a population over many generations?
a. genetic drift b. descent with modification c. differential reproduction d. mutations
The best experimental design _____
A) includes a large sample size for each condition B) includes a control C) alters only one condition between the controls and the experimental condition D) includes a large sample size and a control, and alters only one condition between the controls and the experimental condition
Which of the following best describes the functions of the spinal cord?
a. reflex actions and communication between the brain and the body b. releasing hormones c. intelligence and memory d. speech, taste, smell, vision, and hearing e. controlling muscle activity and maintaining balance
When biologists use the terms fitness or fittest they are talking about __________.
a. how long an individual lives b. passing genes on to the next generation c. how healthy an individual is d. how strong an individual is