Of the following structures, the largest in diameter is the
A. primary bronchus.
B. secondary bronchus.
C. respiratory bronchiole.
D. trachea.
E. tertiary bronchus.
D
You might also like to view...
The placental membrane is composed of
A) the embryonic disc. B) a double layer of epithelial cells. C) a single layer of epithelial cells. D) the amnion and chorion.
Substance A is added to a solution, resulting in a decrease in the pH of the solution. Substance A ________ the H+ concentration; therefore, it is considered a/an ________.
A. decreased; acid B. increased; acid C. decreased; base D. increased; base
In a workout your muscle cells produce lactic acid, yet you maintain a constant blood pH because ________
A) the body contains chemicals called buffers that resist changes in pH B) endothelial cells secrete excess H+ to prevent a decrease in pH C) metabolic acids are neutralized in muscle cells before released into the blood D) metabolic bases are produced at the same rate by muscle cells to neutralize the acids E) the respiratory system removes excess H+ from the blood before the pH is lowered
Juan has great hopes that his 12-year-old son will play professional basketball and wants to do anything that might be helpful. He has heard that the administration of testosterone or other androgens might increase his son's height. Alarmed, you tell him that this may be a treatment that would actually limit his future athletic potential. Why?
What will be an ideal response?