- Industry: Library & information science
- Number of terms: 152252
- Number of blossaries: 0
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The National Library of Medicine (NLM), on the campus of the National Institutes of Health in Bethesda, Maryland, is the world's largest medical library. The Library collects materials and provides information and research services in all areas of biomedicine and health care.
1) A small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus. It gives rise to the atrioventricular bundle of the conduction system of the heart.
2) A small mass of tissue that is situated in the wall of the right atrium adjacent to the septum between the atria, passes impulses received from the sinoatrial node to the ventricles by way of the bundle of His, and in some pathological states replaces the sinoatrial node as pacemaker of the heart.
Industry:Health care
1) A small, membrane-bounded organelle that uses molecular oxygen to oxidize organic molecules; contains some enzymes that produce and others that degrade hydrogen peroxide.
2) Microbodies which occur in animal and plant cells and in certain fungi and protozoa. They contain peroxidase, catalase, and allied enzymes.
3) A cytoplasmic cell organelle containing enzymes (as catalase) which act especially in the production and decomposition of hydrogen peroxide -- called also microbody.
Industry:Health care
1) A small, membrane-bounded organelle that uses molecular oxygen to oxidize organic molecules; contains some enzymes that produce and others that degrade hydrogen peroxide.
2) Microbodies which occur in animal and plant cells and in certain fungi and protozoa. They contain peroxidase, catalase, and allied enzymes.
3) A cytoplasmic cell organelle containing enzymes (as catalase) which act especially in the production and decomposition of hydrogen peroxide -- called also microbody.
Industry:Health care
1) A small, oval, bony chamber of the labyrinth. The vestibule contains the utricle and saccule, organs which are part of the balancing apparatus of the ear.
2) Anatomical cavity that connects an organ cavity, organ cavity subdivision or cavity of body part subdivision to the exterior, completely or partially surrounded by organs or organ parts that are lined by epithelium. Examples: preputial cavity, vestibule of vagina.
3) Structures of the inner ear concerned with reception and transduction of stimuli of equilibrium; they include the semicircular canals, the utricle, and the saccule.
4) Major organ of equilibrium which acts as a sensory receptor that detects the position and changes in the position of the head in space.
5) Any of various bodily cavities especially when serving as or resembling an entrance to some other cavity or space: as (a) 1: the central cavity of the bony labyrinth of the ear, 2: the parts of the membranous labyrinth comprising the utricle and the saccule and contained in the cavity of the bony labyrinth (b): the space between the labia minora containing the orifice of the urethra (c): the part of the left ventricle of the heart immediately below the aortic orifice (d): the part of the mouth cavity outside the teeth and gums.
Industry:Health care
1) A special type of antigen-presenting cell (APC) that activates T lymphocytes.
2) Any of various antigen-presenting cells with long irregular processes.
Industry:Health care
1) A specialized cell division in which a single diploid cell undergoes two nuclear divisions following a single round of DNA replication in order to produce four daughter cells that contain half the number of chromosomes as the diploid cell. Meiosis occurs during the formation of gametes from diploid organisms and at the beginning of haplophase in those organisms that alternate between diploid and haploid generations. Reference(s): PMID:933432
2) A type of cell nucleus division, occurring during maturation of the germ cells. Two successive cell nucleus divisions following a single chromosome duplication (S phase) result in daughter cells with half the number of chromosomes as the parent cells.
3) Meiosis is the formation of egg and sperm cells. In sexually reproducing organisms, body cells are diploid, meaning they contain two sets of chromosomes (one set from each parent). To maintain this state, the egg and sperm that unite during fertilization must be haploid, meaning they each contain a single set of chromosomes. During meiosis, diploid cells undergo DNA replication, followed by two rounds of cell division, producing four haploid sex cells.
Industry:Health care
1) A specific region just upstream from a gene that acts as a binding site for transcription factors and RNA polymerase during the initiation of transcription.
2) A promoter is a sequence of DNA needed to turn a gene on or off. The process of transcription is initiated at the promoter. Usually found near the beginning of a gene, the promoter has a binding site for the enzyme used to make a messenger RNA (mRNA) molecule.
3) A DNA site to which RNA polymerase will bind and initiate transcription.
Industry:Health care
1) A specific region just upstream from a gene that acts as a binding site for transcription factors and RNA polymerase during the initiation of transcription.
2) A promoter is a sequence of DNA needed to turn a gene on or off. The process of transcription is initiated at the promoter. Usually found near the beginning of a gene, the promoter has a binding site for the enzyme used to make a messenger RNA (mRNA) molecule.
3) A DNA site to which RNA polymerase will bind and initiate transcription.
Industry:Health care
1) A specific region or amino acid sequence in a protein associated with a particular function or corresponding segment of DNA.
2) A discrete portion of a protein with its own function. The combination of domains in a single protein determines its overall function.
Industry:Health care
1) A specific, pre-fabricated sequence of DNA or RNA, labeled by one of several methods, used to detect the presence of a complementary sequence by binding (hybridizing) to that site.
2) A probe is a single-stranded sequence of DNA or RNA used to search for its complementary sequence in a sample genome. The probe is placed into contact with the sample under conditions that allow the probe sequence to hybridize with its complementary sequence. The probe is labeled with a radioactive or chemical tag that allows its binding to be visualized. In a similar way, labeled antibodies are used to probe a sample for the presence of a specific protein.
Industry:Health care
