Abnormally high levels of this gas in the bloodstream can ...

[cookcarl]

Abnormally high levels of this gas in the bloodstream can potentially lead to increased intracranial pressure:
 
  a. nitrogen
  b. oxygen
  c. argon
  d. carbon dioxide

Question 2

What mechanism causes the lungs to expand and air to rush into the airway?
 
  a. expansion of the chest wall and upward movement of the diaphragm
  b. relaxation of the chest wall and downward movement of the diaphragm
  c. expansion of the chest wall and downward movement of the diaphragm
  d. relaxation of the chest wall and upward movement of the diaphragm

[shoemake]

Answer to Question 1

D

Answer to Question 2

C

[cookcarl]

Thanks for the timely response, appreciate it

[matt95]

Gracias!