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Stereocilia (or stereovilli or villi) are non-motile apical cell modifications. They are distinct from cilia and microvilli , but are closely related to microvilli. They form single "finger-like" projections that may be branched, with normal cell membrane characteristics.
Pseudostratified columnar epithelia with stereocilia are located in the epididymis. Stereocilia of the epididymis are not cilia because their cytoskeleton is composed of actin filaments, not microtubules. [3] They are structurally and molecularly more similar to microvilli than to true cilia. [dubious – discuss]
Microvilli (sg.: microvillus) are microscopic cellular membrane protrusions that increase the surface area for diffusion and minimize any increase in volume, [1] and are involved in a wide variety of functions, including absorption, secretion, cellular adhesion, and mechanotransduction.
Contrasting with stereocilia, which are numerous, there is only one kinocilium on each hair cell. The kinocilium can be identified by its apical position as well as its enlarged tip. [1] Together with stereocilia, the kinocilium regulates depolarization and hyperpolarization of the hair cell, which is a neuron that can generate action ...
The hair bundle is composed of stiff microvilli called stereocilia and is involved with mechanoreception of sound waves. Stereocilia cells generate an electrical response to the vibrations of sound waves, crucial for normal hearing. This gene is part of a tandem duplication on chromosome 15; the second copy is a pseudogene.
Simple cuboidal, with microvilli - urinary: kidney - ascending thin limb: Simple squamous - urinary: kidney - distal convoluted tubule: Simple cuboidal, without microvilli - urinary: kidney - collecting duct: Simple cuboidal - urinary kidney - Bowman's capsule: Simple squamous - urinary kidney - Loop of Henle: Simple squamous - urinary kidney ...
A recent study found that adding 111 minutes of daily walking could help you live 11 years longer. Here's experts want you to know about walking's benefits.
Each of these bundles are approximately 4-10 μm high and have 30-300 stereocilia and one kinocilium, which has motile characteristics. Along the axis of symmetry, each successive row of stereocilia is approximately 0.5-1.0 μm taller, with the kinocilium next to the tallest row. Extracellular structures connect the stereocilia together.