Which layer of the wall of the alimentary canal contracts to move materials through the canal?
A. mucosa
B. submucosa
C. muscular layer
D. serosa
C. muscular layer
Health Professions
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Communication between two or more vessels is termed:
A) collateral B) coronary sulcus C) circumflex D) anastomoses
Health Professions
For a service to be considered medically necessary by Medicare, which of the following criteria must be met?
It is delivered at the most appropriate level. It is an elective procedure. It is an investigational procedure. It is performed for the patient's convenience.
Health Professions
Who administers workers' compensation laws?
Health Professions
In COPD, which hemodynamic parameter is most increased?
a. SVR c. mean pulmonary artery pressure b. PCWP d. cardiac output
Health Professions