Answer to Question 1
ANS: B
A syringe calibrated in units is used for insulin. A tuberculin syringe is not properly calibrated for use with insulin. A syringe calibrated in mL or in tenths of mL would not be an accurate way to measure insulin doses.
Answer to Question 2
ANS: D
The barrel contains the calibrations necessary for measurement. The plunger, the tip, and the Luer Lok do not have the calibrations indicated on them.