Health, 20.10.2021 08:30 Isactuallycarter99

All of the following statements are true about sensation except one. Which statement is FALSE? Select one: a. Sensory receptors receive incoming information and change it into nerve impulses. b. Humans have no receptors for detecting bands of electromagnetic waves that are shorter than or longer than the visible light spectrum. c. Humans can even detect physical energies for which they have no receptors. d. Humans have no receptors for detecting sound vibrations that are too high or too low.

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To discuss how sound receptors work, first, we must mention the order of events. Sound waves travel to the ear creating a vibration in the tympanic membrane. This energy transforms into mechanical energy to the malleus, incus, and stapes. The stapes are in close proximity to the oval window, and it amplifies the mechanical energy to the cochlea, a fluid-filled structure with a fluid called perilymph, by directly pushing on it. The cochlea has three layers called scala vestibuli (the ascending portion), scala media, and scala tympani (the descending portion). The organ of Corti is on the basilar membrane surface, and it contains hair cells which are the primary receptors in sound signal creation. There are two varieties of hair cells: inner and outer. Inner cells transmit information to the auditory nerve, and outer cells mechanically amplify low-level sound entering the cochlea.

Inner hair cells have an attachment with a tectorial membrane to which they bend against with movement of the cochlear duct membranes and fluids. When the stereocilia on the hair cells bend towards the longest cilia, potassium and voltage-gated calcium channels open, and ion influx increases resulting in depolarization. This depolarization allows for neurotransmitter release at the auditory nerve in the postsynapse, generating nerve impulses to be propagated from stereocilia of hair cells to the central nervous system via glutamate transmission. Discrimination of sound is via the location of the original nerve impulses from different areas of the cochlea.

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C would be the best choice

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