hair cell
Noun: A hair cell is a specialized sensory epithelial cell. It is a mechanoreceptor cell, meaning it converts mechanical movement (like sound vibrations or fluid motion) into electrical signals that the nervous system can understand. These cells are named for their hair-like structures called stereocilia that project from their apical surface. Hair cells are primarily found in the inner ear, within the cochlea (organ of Corti) for hearing and within the vestibular system (saccule, utricle, semicircular canals) for balance.
Hair cells are the fundamental sensory receptors for the auditory and vestibular systems. They do not regenerate in humans, making their damage a leading cause of permanent hearing loss and balance disorders. - The term is used in biological, medical, and audiological contexts. - It is typically modified by its location or function (e.g., cochlear hair cell, vestibular hair cell, inner hair cell, outer hair cell).
- Noun:
- Exposure to loud noise can permanently damage the delicate hair cells in your cochlea.
- The bending of the stereocilia on a hair cell triggers the release of neurotransmitters.
- Vestibular hair cells are essential for our sense of balance and spatial orientation.
- Hair cell transduction: The specific process by which mechanical deflection of the stereocilia opens ion channels, leading to cell depolarization and neural signaling.
- The study focused on the molecular mechanisms of hair cell transduction.
- Hair cell bundle: Refers to the organized cluster of stereocilia (and sometimes a single kinocilium) on top of the cell.
- The integrity of the hair cell bundle is crucial for proper function.
- Inner hair cell (IHC): A type of cochlear hair cell; the primary sensory cells that transmit auditory information to the brain via the auditory nerve.
- Outer hair cell (OHC): A type of cochlear hair cell; they amplify and fine-tune the sensitivity of the cochlea through a process called electromotility.
- Stereocilium (pl. stereocilia): The non-motile, actin-filled microvilli that form the "hairs" of the hair cell and are the site of mechanotransduction.
- Mechanoreceptor: A broader category of sensory receptors that respond to mechanical pressure or distortion, which includes hair cells.
- Organ of Corti: The structure in the cochlea containing the auditory hair cells.
- Auditory receptor cell (specifically for cochlear hair cells).
- Sensory hair cell.
- Mechanosensory cell (in this specific context).
- Hair cell loss/death: The irreversible damage or destruction of hair cells.
- Aminoglycoside antibiotics can cause hair cell loss.
- Hair cell regeneration: A process that occurs naturally in some vertebrates (like birds) but not in mature mammals, making it a major focus of hearing loss research.
- Scientists are investigating pathways to induce hair cell regeneration in mammals.
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a sensory epithelial cell present in the organ of Corti
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