Definition is a rhetorical mode that can be used in something smaller or shorter than a full paper. You can use extended definition for several paragraphs only in a paper of much greater length. You also can add to a paper a one-paragraph definition--like a brief encyclopedia definition.
Depending upon location, neural crest cells give rise to most of the peripheral nervous system, as well as various non-neural tissues, like craniofacial bone and cartilage, the thymus and parathyroid glands, and the cardiac outflow tract â in short, all of the tissues that are affected in DiGeorge syndrome.
In the present study, we investigated how the Bcl-2 family relates to the ceramide-mediated apoptotic pathway induced by etoposide (VP-16), cisplatin (CDDP), or TNF-using C6 rat glioma cells and U87-MG human glioblastoma cells transfected with bax or bcl-2 gene.igure 3 Effects of Bcl-2 or Bax overexpression on ceramide formation and neutral sphingomyelinase activation in etoposide-treated C6 cells. C6/Neo (), C6/Bcl-2 (), and C6/Bax () cells were treated with 40 M etoposide for indicated periods.