Sound and Smell

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Sound is defined as the movement of air molecules brought about by a source of vibration. The ear works by picking up sound waves vibration in the eardrum, which is located inside your ear. Then the sound waves are carried through a fluid in the inner ear called cochlea, this process turns and vibrates tiny hairs that tune to different pitches of sound. Information from the vibration of the hairs stimulates nerves is then sent to the signals of the brain to be processed. The ear is similar to a microphone where sound vibrates a diaphragm, which causes electrical signals to travel through a wire to a processor. Sound is made up of characteristics which are pitch and loudness. Pitch is known as the tone of a sound wave that is
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Researchers must be careful about the odors they use when conducting experiments because some scents activate the somatosensory system, which are the nerve endings. This is why people who might not have a sense of smell can still detect certain substances like menthol because they activate those nerves.

A large reason for experiencing different forms of taste such as: sour, salty, sweet, and bitter is because of our tongue. The tongue is an extremely movable set of muscles, which is supplied with blood and has many nerves. The tongue has many different function, but its main function is to enable us to eat. It allows to suck when trying to drinking something, softens up solid foods so that we can swallow it properly, and allows us to differentiate between many different tastes; which helps us determine if a type of food is good for us or not. Also, the tongue is covered in taste receptors, which are located throughout. This is where the chemical substances responsible for the sense of taste are mediated by groups of cells called taste buds which sample oral concentrations of a large number of small molecules and report a sensation of taste to centers in the brainstem. In most animals, including humans, taste buds are most prevalent on small pegs of epithelium on the tongue called papillae. Perception of taste also appears to be influenced by thermal stimulation of the tongue. In some
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