If you centrifuge (spin)whole blood,you will find the red blood cells (erythrocytes)at the bottom of the tube and white blood cells atop them.This implies that ________.
A) red blood cells are larger than white blood cells
B) white blood cells are fewer in number than red blood cells
C) white blood cells are smaller than red blood cells
D) red blood cells have a greater density than white blood cells

Question

Quizplus · Accepted Answer

The fact that red blood cells are found at the bottom of the tube (after centrifugation) and white blood cells atop them, indicates that red blood cells have a greater density than white blood cells. This is due to the fact that the centrifugal force separates the components of the blood sample based on their relative densities, with the more dense components (such as red blood cells) moving toward the bottom of the tube. Since white blood cells are less dense than red blood cells, they appear at the top of the tube. The size or number of the cells is not related to their relative positions after centrifugation.

If You Centrifuge (Spin)whole Blood,you Will Find the Red Blood