The initial phase of an action potential is caused by a
A) potassium influx B) sodium efflux C) potassium efflux D) sodium influx
D
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A new OEC Technician asks you why the elderly are at higher risk for developing pneumonia than younger individuals. You inform him that the elderly are more susceptible to respiratory infections because of:
a. impaired swallowing of saliva. b. decreased alveolar gas exchange. c. a reduced cough reflex. d. hardening of the major arteries.
How does the anticoagulant EDTA prevent coagulation from occurring?
a. Binds calcium in a soluble complex b. Enhances antithrombin activity c. Chelates calcium ions d. Inhibits factor XII activity
Firefighters-particularly the ____-must have a thorough understanding of hydraulics.
A. engine driver B. officer C. logistics section chief D. pump operator
To locate congenital anomalies in the Alphabetic Index of the ICD-9-CM, the coder should first reference the __________
Fill in the blank(s) with correct word