Question

for a person whose hematocrit is 45%, in which choice below are the components of blood correctly ranked in order of decreasing percent volume?
multiple choice
wbcs, rbcs, plasma
wbcs, plasma, rbcs
plasma, rbcs, wbcs
rbcs, wbcs, plasma
plasma, wbcs, rbcs

Explanation:

Blood is composed of plasma (about 55% of blood volume), red blood cells (RBCs, about 45% in this case), and white blood cells (WBCs, less than 1%). So the order from highest to lowest percent volume is plasma, RBCs, WBCs.

Answer:

Plasma, RBCs, WBCs (the option that matches this order)