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MECHANORECEPTORS
Mechanoreceptors
respond to being mechanically pushed and pulled
through touch, pressure, gravity, stretch, and
movement. As their contour changes, mechanoreceptors
supply information to the animal about shape,
texture, weight, and the landscape of objects
in the external environment. Through the use of
mechanoreceptors we can feel, maintain balance,
and even hear.
Feeling occurs when mechanoreceptors
detect touch, pressure, and pain as objects come
in contact with the skin.
Another kind of mechanoreceptor
is responsible for proprioception, or balance,
which enables an animal to know the position of
its body. Proprioceptors are located within
muscles, tendons, and joints.
Mechanoreceptors also facilitate
hearing. For terrestrial vertebrates, hearing
occurs when sound waves in the air become pressure
waves in the cochlear fluid, resulting in depolarization
of sensory neurons. The cochlear nerve then transmits
these impulses to the brain.
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