What organisms are hair cells found in?

Sensory hair cells are highly specialized mechanosensitive cells found in all vertebrate animals in some related chordates (tunicates). The structure of hair cells makes them highly sensitive to displacement of the fluid environment that surrounds their apical microvilli, or stereocilia.

What is an outer hair cell?

Abstract. Outer hair cells (OHCs) in the mammalian ear exhibit electromotility, electrically driven somatic length changes that are thought to mechanically amplify sound-evoked vibrations.

Where are the outer hair cells located?

The outer hair cells are located near the center of the basilar membrane where vibrations will be greatest while the basilar membrane is anchored under the inner hair cells (see Figure 5).

What is the difference between inner and outer hair cells?

The main difference between inner and outer hair cells is that the inner hair cells convert sound vibrations from the fluid in the cochlea into electrical signals that are then transmitted via the auditory nerve to the brain whereas the outer hair cells amplify low-level sounds that enter into the fluids of the cochlea …

What is the function of the outer hair cells in the spiral organ organ of Corti?

Outer hair cells serve a function as acoustic pre-amplifiers which improve frequency selectivity by allowing the organ of Corti to become attuned to specific frequencies, like those of speech or music. The fibrous tectorial membrane rests on top of the stereocilia or the outer hair cells.

What are outer hair cells supported by?

Each outer hair cell is supported by a phalangeal cell of Deiters, or supporting cell, which holds the base of the hair cell in a cup-shaped depression. From each Deiters’ cell a projection extends upward to the stiff membrane, the reticular lamina, that covers the organ of Corti.

What is the function of the outer hair cells in the organ of Corti?

Are outer hair cells efferent?

The inner hair cells are the actual sensory receptors, and 95\% of the fibers of the auditory nerve that project to the brain arise from this subpopulation. The terminations on the outer hair cells are almost all from efferent axons that arise from cells in the brain.

Can you get DNA from a hair?

Hair that is cut or shed does not unfortunately contain any nuclear DNA. For hair DNA testing to be successful the hairs must have the hair follicle attached. Nevertheless, whether the hair is old or freshly plucked, you can still conduct your hair DNA paternity test.

What is the function of the outer hair cells in the spiral organ organ of Corti quizlet?

What is the function of the outer hair cells in the spiral organ (organ of Corti)? They are the true receptors that transmit the vibrations of the basilar membrane to the cochlear nerve.