Answer to Question 1
ANS: B
Intense daylight and fluorescent, incandescent, xenon, and infrared light sources have caused errors in pulse oximetric readings. Anemia and deeply pigmented skin can affect the accuracy of pulse oximetry; however, the effect of anemia is not clinically significant until the hemoglobin level is markedly reduced.
Answer to Question 2
ANS: C
Normal resting O2 consumption is approximately 250 ml/min and O2 consumption increases with activity, stress, and temperature.