But few teens actually get that much sleep regularly, thanks to factors such as part-time jobs, early-morning classes, homework, extracurricular activities, social demands, and use of computers and other electronic gadgets. Sleep deprivation might not seem like a big deal, but it can have serious consequences. Tired teens can find it difficult to concentrate and learn, or even stay awake in class. Too little sleep also might contribute to mood swings and behavioral problems. Drowsy driving can lead to serious â even deadly â accidents.
Necrotizing ulcerative gingivitis (NUG) is a condition affecting the gums that is caused by a bacterial infection. It is a form of periodontal (gum) disease. But unlike other forms, it typically develops quickly and causes moderate to severe pain. Necrotizing means that the condition destroys tissue.
nucleoid. a region in the cells of prokaryotes that contains nucleic acids but which is not bounded by a membrane: it is analogous in function to the nucleus of eukaryotic cells.; from nucloid; from nucl(eus) + -oid.a region in the cells of prokaryotes that contains nucleic acids but which is not bounded by a membrane: it is analogous in function to the nucleus of eukaryotic cells. Origin of nucleoid.ucleoid. ; from nucloid; from nucl(eus) + -oid. a region in the cells of prokaryotes that contains nucleic acids but which is not bounded by a membrane: it is analogous in function to the nucleus of eukaryotic cells.