Phlebotomy 9th Edition by Diana Garza,Kathleen Becan McBride

Exercise 8

For the following questions, select the one best answer. Plastic micro collection tubes should be filled with blood in which of the following ways?
A) using a syringe to fill the tube
B) allowing the tube to fill by itself using capillary action
C) using suction to pull blood into the tube
D) using the tube to scoop droplets off the skin carefully