animal cell with nucleus, cytoplasm, dna, enzime, protein kinase

activated anatomy animal atp biology calcitonin camp cell cellular cytoplasm diabetes diagram dna endocrine endocrinology enzime enzyme epinephrine estrogen glucagon glucose glycogen grown health hormone hormones human insulin kinase luteinizing mechanism medicine melatonin metabolism non nonsteroid nucleus organ oxytocin parathyroid pathway physiology prolactin protein receptor receptors response steroid system target thyroxine