The _______________ cells are cells that do not transmit impulses, but function as support cells for other neurons and never lose their ability to divide. 

In ________, the cell engulfs the substance and permits the substance to enter the cell

a. facilitated diffusion b. passive diffusion c. pinocytosis d. active transport

A white blood cell count that is below normal is called ________. 

Fill in the blank(s) with the appropriate word(s).