Oxygen consumption:

1. increases with exercise.
2. is the amount of oxygen used by the body.
3. is inversely related to carbon dioxide production.
4. is about 250 mL/min in the resting adult.
a. 1, 2
b. 3, 4
c. 2, 4
d. 1, 2, 4

D
Oxygen consumption is the amount of oxygen used by the body and increases with exercise. At rest, an adult consumes about 250 mL/min. Oxygen use is not inversely related to carbon dioxide production.