The ____ devices allow the Paramedic some degree of choice in determining gas flow and oxygen concentration.

The most common cause of cellular injury is oxygen deficiency, or:

a. ischemia. c. infarction. b. hypoxia. d. inflammation.

The ________ division of the autonomic nervous system prepares organs for stressful or emergency situations. 

Fill in the blank(s) with the appropriate word(s).