The respiratory tree does not include the lungs, air passages, or anatomical structures of the thoracic and abdominal cavities

When an individual reports pain in the parietal, temporal, supraorbital, or maxillary tooth regions, then investigate:

a. Temporalis b. Masseter c. Lateral pterygoid d. Medial pterygoid

Because of an extremely low PO2, you suspect that an arterial blood sample taken from a pa-tient's brachial artery might have been contaminated with venous blood. Which of the following might help to confirm your suspicion?

a. Call the laboratory resources/staff to get the latest chemistry report. b. Inspect the sample for color and con-sistency. c. Cross-check the sample with an SpO2 reading. d. Measure the sample's actual hemoglobin saturation.