Which medical procedure involves the separation of plasma from the blood cells in whole blood?
A) stem cell transplantation
B) plasmapheresis
C) blood donation
D) blood transfusion
B
Explanation: A) This does not describe stem cell transplantation.
B) Correct! During plasmapheresis, a unit of blood is spun in a centrifuge, and the blood cells are pulled to the bottom. The plasma portion at the top is siphoned off.
C) This does not describe blood donation.
D) This does not describe blood transfusion.
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