Termination of anesthesia and the process of regaining consciousness are called ____________

Which of the following statements about oxygen concentrations and combustions is MOST accurate?

A. Combustion does not occure at concentrations below about 18% because fire needs oxygen to burn. B. Combustion will occur below normal oxygen levels only when the substance burning is an oxidizer C. Combustion requires oxygen levels in the immediate range of ambient air (21%) in order to burn freely D. Combustion may occur at oxygen concentrations as low as 14% or lower given the right circumstances

A lateral scapular projection obtained with the patient rotated less than needed to superimpose the borders of the scapula will demonstrate the thick border next to the ribs and the thin border laterally

Indicate whether the statement is true or false.