hair cells

hair cells
(1) Cells found in the epithelial lining of the labyrinth of the inner ear. The hairs are stereovilli up to 25 m m long that restrict the plane in which deformation of the apical membrane of the cell can be brought about by movement of fluid or by sound. Movement of the single stereocilium transduces mechanical movements into electrical receptor potentials.
(2) Bot. Many plant surfaces are covered with fine hairs ( Tradescantia stamens are a common source) ; the hairs are made up of thin-walled cells that are convenient for studying cytoplasmic streaming and for observing mitosis.

Dictionary of molecular biology. 2004.

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  • Hair cells — Hair Hair (h[^a]r), n. [OE. her, heer, h[ae]r, AS. h[=ae]r; akin to OFries. h[=e]r, D. & G. haar, OHG. & Icel. h[=a]r, Dan. haar, Sw. h[*a]r; cf. Lith. kasa.] 1. The collection or mass of filaments growing from the skin of an animal, and forming… …   The Collaborative International Dictionary of English

  • hair cells — neuroepithelial cells with hairlike processes (kinocilia or stereocilia or both), found in the internal ear. Those in the organ of Corti are called auditory hair cells, are connected to fibers of the cochlear nerve, and control the sense of… …   Medical dictionary

  • vestibular hair cells — hair cells found in the maculae of the utricle and saccule, serving as sensory receptors responsive to changes in position; they regulate the sense of equilibrium by sending impulses up the vestibular nerve to the brain. There are two types of… …   Medical dictionary

  • inner hair cells — a flask shaped type of auditory hair cells, found in a single row on the medial side of the inner tunnel of the organ of Corti; they receive impulses from the outer hair cells and transform them into electrical signals that are given to the… …   Medical dictionary

  • outer hair cells — a type of cylindrical auditory hair cell found in three rows on the lateral side of the Corti tunnel, supported by outer phalangeal cells; they receive sound waves and transmit them to the inner hair cells for transformation into electrical… …   Medical dictionary

  • Hair — (h[^a]r), n. [OE. her, heer, h[ae]r, AS. h[=ae]r; akin to OFries. h[=e]r, D. & G. haar, OHG. & Icel. h[=a]r, Dan. haar, Sw. h[*a]r; cf. Lith. kasa.] 1. The collection or mass of filaments growing from the skin of an animal, and forming a covering …   The Collaborative International Dictionary of English

  • Hair bracket — Hair Hair (h[^a]r), n. [OE. her, heer, h[ae]r, AS. h[=ae]r; akin to OFries. h[=e]r, D. & G. haar, OHG. & Icel. h[=a]r, Dan. haar, Sw. h[*a]r; cf. Lith. kasa.] 1. The collection or mass of filaments growing from the skin of an animal, and forming… …   The Collaborative International Dictionary of English

  • Hair compass — Hair Hair (h[^a]r), n. [OE. her, heer, h[ae]r, AS. h[=ae]r; akin to OFries. h[=e]r, D. & G. haar, OHG. & Icel. h[=a]r, Dan. haar, Sw. h[*a]r; cf. Lith. kasa.] 1. The collection or mass of filaments growing from the skin of an animal, and forming… …   The Collaborative International Dictionary of English

  • Hair divider — Hair Hair (h[^a]r), n. [OE. her, heer, h[ae]r, AS. h[=ae]r; akin to OFries. h[=e]r, D. & G. haar, OHG. & Icel. h[=a]r, Dan. haar, Sw. h[*a]r; cf. Lith. kasa.] 1. The collection or mass of filaments growing from the skin of an animal, and forming… …   The Collaborative International Dictionary of English

  • Hair glove — Hair Hair (h[^a]r), n. [OE. her, heer, h[ae]r, AS. h[=ae]r; akin to OFries. h[=e]r, D. & G. haar, OHG. & Icel. h[=a]r, Dan. haar, Sw. h[*a]r; cf. Lith. kasa.] 1. The collection or mass of filaments growing from the skin of an animal, and forming… …   The Collaborative International Dictionary of English

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