the authors have determined the serum thyroid hormone levels [ total and free triiodothyronine ( t3 ) , thyroxine ( t4 ) ] , the liver t3 content , the mitochondrial alpha-glycerophosphate dehydrogenase activity ( alpha-gpdh ) and the number of mitochondria per cell in the rat from birth to old age .
C0026237
mitochondria
C0007634
cell