Select Page

Archives: Dictionary

Kiesselbach’s plexus

Lies in Kiesselbach’s area, Kiesselbach’s triangle, or Little’s area, is a region in the anteroinferior part of the nasal septum where four arteries anastomose to form a vascular plexus of that name. The arteries are: Anterior ethmoidal artery (from the ophthalmic artery) Sphenopalatine artery (terminal branch of the maxillary artery) Greater palatine artery (from the maxillary artery) Septal branch of the superior labial artery (from the facial...

Read More

Killer T cell

1. A T lymphocyte (a type of white blood cell) that kills cancer cells, cells that are infected (particularly with viruses), or cells that are damaged in other ways. (wikipedia.org) 2. T cell with CD8 receptor that recognizes antigens on the surface of a virus-infected cell and binds to the infected cell and kill it. (wordnetweb.princeton.edu) 3. A type of T cell that does not express markers of either T or B-cell lineage, but may possess fc receptors for immunoglobulin g. It functions by killing target cell through antibody-dependent cell-mediated cytotoxicity or through perforin, killing cells without prior sensitization (hence, the name). (biology-online.org) 4. Mammalian cell that is capable of lysing antibody-coated target cell. (biology-online.org) Syn: TC, Cytotoxic T Lymphocyte, CTL, T-Killer cell, cytolytic T cell, CD8+ T-cells or killer T cell, cytotoxic T...

Read More

Kinesthesia

/ˌkinəsˈTHēZHə/ Noun 1. Sensation or perception of motion. (wiktionary.org) (Physiology) the perception of the movement of one’s own body, its limbs and muscles etc. (Performing arts) A spectator’s perception of the motion of a performer, or, the effect of the motion of a scene on the spectator. 2. Proprioception or static position sense; the perception of the position and posture of the body; also, more broadly, including the motion of the body as well. (wiktionary.org) 3. Awareness of the position and movement of the parts of the body by means of sensory organs (proprioceptors) in the muscles and joints. (Google Dictionary) 4. The ability to feel movements of the limbs and body. (wordnetweb.princeton.edu) Word origin: Modern Latin compound of Greek kinein “to set in motion; to move” + aisthesis...

Read More

Kinetoplast

/kəˈnetəˌplast/ Noun, pl. kinetoplasts 1. A network of circular DNA (called kDNA) inside a large mitochondrion that contains many copies of the mitochondrial genome. The most common kinetoplast structure is that of a disk, but has been observed in other arrangements. Kinetoplasts are only found in protozoa of the class Kinetoplastida. The variation in the structures of kinetoplasts may reflect phylogenic relationships between Kinetoplastids. Kinetoplasts are usually adjacent to the organisms’ flagellar basal body leading to the thought that they are tightly bound to the cytoskeleton. (wikipedia.org) 2. A disk-shaped mass of circular DNA inside a large mitochondrion, found specifically in protozoa of the class Kinetoplastea – (kinetoplastids). (wiktionary.org) 3. Mass of mitochondrial dna, usually adjacent to the flagellar basal body, in flagellate protozoa. (biology-online.org) 4. A mass of mitochondrial DNA lying close to the nucleus in some flagellate protozoa. (Google...

Read More

Kingdom

/ˈkiNGdəm/ Noun, pl. kingdoms 1. A rank in the classification of organisms, below domain and above phylum; a taxon at that rank (e.g. the plant kingdom, the animal kingdom). (wiktionary.org) 2. A taxonomic rank, which is either the highest rank or in the more recent three-domain system, the rank below domain. Kingdoms are divided into smaller groups called phyla (in zoology) or divisions in botany. (wikipedia.org) 3. Each of the three traditional divisions (animal, vegetable, and mineral) in which natural objects have conventionally been classified. (Google Dictionary) 4. The highest category in taxonomic classification. (Google Dictionary) 5. The highest taxonomic group into which organisms are grouped; one of five biological categories: Monera or Protoctista or Plantae or Fungi or Animalia. (wordnetweb.princeton.edu) Word origin: Latin, regnum, pl....

Read More
  • 1
  • 2

Struggling in Biology?

Are You Premed?

Confused about the MCAT? Not sure how to prepare? This guide will show you how