Three categories of cells in vivo (1)Cycling cells Dividing continuously-Stem cells 2)G In cells appropriate stimulus: liver cells, lymphocyte en an Do not divide normally, but divide when 3)Terminally Differentiated cells Highly specialized, have lost the ability to divide until they die: muscle cells, red blood cells, nerve cells MR YANTHNMR YAN ❖ Three categories of cells in vivo (1)Cycling cells Dividing continuously—Stem cells (2) G0 cells Do not divide normally, but divide when given an appropriate stimulus: liver cells, lymphocytes (3) Terminally Differentiated cells Highly specialized, have lost the ability to divide until they die: muscle cells, red blood cells, nerve cells