what is the difference between inner and outer hair cells?
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Hair cells are the receptive cells of the inner ear. ... In humans, outer hair cells are more numerous (approx. 12,000) than inner hair cells (approx 3500). The "hairs" on these cells project toward the inside of the cochlear duct and are embedded in a covering membrane (the tectorial membrane).
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Accordingly, the main difference between epidermis and epithelium is that the epidermis is the outermost layer of the skin while epithelium is the tissue which covers the internal and external surfaces of the body.
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Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear.
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The internal part is placed under the skin behind the ear during an outpatient surgery. A thin wire and small electrodes lead to the cochlea, which is part of the inner ear. The wire sends signals to the cochlear nerve, which sends sound information to the brain to produce a hearing sensation.
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The ear is the organ of hearing and, in mammals, balance. In mammals, the ear is usually described as having three parts—the outer ear, the middle ear and the inner ear.
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The differences are: the root hair cell does not contain any chloroplasts, they have a. ... Palisade cells are found in the leaves and they are responsible for making food Root hair cells do not have any chloroplasts but they have a special shape so.
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What is the difference between the sounds that primary and secondary auditory cortex's hear? -Neurons in primary auditory cortex respond to pure tones, but neurons in seconary auditory cortex require more complex sounds. For instance, in monkeys, neurons in secondary auditory cortex respond better to monkey calls.
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Answer and Explanation: The tiny hairs (cilia) in the Organ of Corti within the cochlea are indeed mechanoreceptors. Their job is to convert (or transduct) sound waves into...
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As adjectives the difference between outer and outermost is that outer is outside; external while outermost is (outer).
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Endothelial cells cover the inner surface of the blood vessel, while the epithelial cells cover the inner surface of the internal organs and the outer surface of the human body.
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Sensorineural hearing loss The most common type of hearing loss is sensorineural. It is a permanent hearing loss that occurs when there is damage to either the tiny hair-like cells of the inner ear or the auditory nerve itself, which prevents or weakens the transfer of nerve signals to the brain.
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What is the difference between Sensory and Motor Neurons? ... Sensory neurons carry signals from the outer parts of your body (periphery) into the central nervous system. Motor neurons (motoneurons) carry signals from the central nervous system to the outer parts (muscles, skin, glands) of your body.
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The outer ear's shape helps to collect sound and direct it inside the head toward the middle and inner ears. Along the way, the shape of the ear helps to amplify the sound — or increase its volume — and determine where it's coming from. From the outer ear, sound waves travel through a tube called the ear canal.
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Middle ear. The middle ear is located between the external and inner ear. It is separated from the ear canal of the outer ear by the tympanic membrane (the eardrum). The middle ear functions to transfer the vibrations of the eardrum to the inner ear fluid.
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The otolith organs are found diagonally under the semicircular canals and have a similar function: There are also thin sensory hair cells in both organs. The difference is that, unlike in the semicircular canals, there are small crystals on the hair cells – like pebbles on a carpet.
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Neurons of the auditory or vestibulocochlear nerve (the eighth cranial nerve) innervate cochlear and vestibular hair cells. ... Inner hair cell nerve fibers are also very heavily myelinated, which is in contrast to the unmyelinated outer hair cell nerve fibers.
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During vision, rod and cone photoreceptors respond to light intensity and color. During hearing, mechanoreceptors in hair cells of the inner ear detect vibrations conducted from the eardrum.