Correct answer choice is:
A.
Low frequency
.
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Explanation:
Place theory is a theory of hearing which declares that our judgment of sound depends on where each element frequency generates oscillations along the basilar layer. According to the frequency theory, the pulse rate of the nerve vibrations of the hearing nerve communicates to the rate of a pitch, which enables us to identify its pitch. The complete basilar layer is stimulated by sound waves at various frequencies.
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Answer:
The type of sensory cells that cover the tongue are often called papillae. They are tiny nodes that contain the taste buds and the serous glands. Serous glands secrete some of the fluid in saliva, often done when the taste buds taste the food you eat and send it to the brain.