Category: N

  • Necrosis

    Necrosis

    Morphological changes that follow cell death, usually involving nuclear and cytoplasmic changes. A pathological process caused by the progressive degradative action of enzymes that is generally associated with severe cellular trauma. It is characterized by mitochondrial swelling, nuclear flocculation, uncontrolled cell lysis, and ultimately cell death. The death of cells by unprogrammed methods as opposed…

  • Nausea

    Sensation of unease and discomfort in the stomach with an urge to vomit. An unpleasant sensation vaguely referred to the epigastrium and abdomen, with a tendency to vomit. Sickish feelings in the stomach characterized by a feeling to vomit. Upset stomach associated with the urge to vomit. Feeling that one is going to vomit; it…

  • Natriuresis

    The discharge of excessive large amount of sodium through urine. Excretion of abnormally large amounts of sodium in the urine, usually the result of diuretic drug intake or certain metabolic disorders. The excretion of sodium in the urine, particularly if the amount excreted is more than normal. An agent that causes this sodium excretion usually…

  • Narcotic

    An agent that produces narcosis, in moderate doses it dulls the senses, relieves pain and induces sleep; in excessive dose it cause stupor, coma, convulsions and death. Any opioid-derived drug, natural or synthetic, that relieves pain or alters mood. May cause addiction. A drug or agent which in moderate doses depresses the central nervous system,…

  • NAFLD

    Non-alcoholic fatty liver disease.  

  • NADPH

    The reduced form of nicotinamide adenine dinucleotide phosphate that serves as an electron carrier.  

  • N-nitrosoproline

    An indicator for N-nitrosation of amines.  

  • N-nitrosmorpholine

    A human carcinogen.  

  • 5’-Nucleotidase

    (5’-ribonucleotide phosphohydrolase), an intrinsic membrane glycoprotein present as an ectoenzyme in a wide variety of mammalian cells, hydrolyzes 5’-nucleotides to their corresponding nucleosides.  

  • Necrotizing ulcerative periodontitis

    Necrotizing ulcerative periodontitis

    An infection characterized by necrosis of gingival tissues, periodontal ligament, and alveolar bone. These lesions are often associated with malnutrition, human immunodeficiency virus infection, and immunosuppression.