Final answer:
To get 5 mL of plasma, you need to draw blood, collect it in an anticoagulant-containing tube, centrifuge it to separate the plasma, and then measure out the 5 mL of plasma from the top of the tube.
Step-by-step explanation:
If you are asked to obtain 5 mL of plasma, you would need to draw blood from a person and then separate the plasma from the blood cells. To do this, the blood samples are typically collected into tubes containing anticoagulants, such as lithium heparin, which prevent the blood from clotting. Once the blood sample has been collected, it is then centrifuged. During centrifugation, the heavier blood cells move to the bottom of the tube, and the plasma, which is the liquid portion of the blood, rises to the top. The plasma can then be carefully collected using a pipette or other transfer tool to measure out the 5 mL required.