What are special proteins that attack invading organisms called?

How does a medical assistant correct somatic tremors when performing an ECG?

a. Have the patient place his or her hands over the head b. Have the patient sit up c. Have the patient place his or hands palm side down under the hips d. Encourage the patient to talk during the procedure to relieve anxiety

Providers can do all but ONE of the following regarding accepting Medicare assignment:

a. Accept assignment for all Medicare fees b. Accept assignment for Medicare fees on a case-by-case basis c. Accept assignment on a patient-by-patient basis d. None of the above