In Section 2, the Root Operation Definitions —putting pressure on a body part is the definition of:

What are the two principles of operation for pulse oximetry? 1. Photoplethysmography 2. Tonometry 3. Spectrophotometry 4. Amperometry 5. Potentiometry

a. 1 and 3 c. 1 and 5 b. 2 and 4 d. 3 and 5

To obtain a referral authorization from a managed care company, the medical assistant must first ________.

A. call the patient's primary care provider's office, and ask for the person in charge of referrals B. obtain an authorization number from the insurance provider C. submit a CMS-1500 form to the insurance provider D. document the phone call