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Understanding Mechanoreceptors: Sensory Responses in Sound and Pressure Perception

Learn about mechanoreceptors, specialized sensory cells that respond to tactile stimuli, sound, vibrations, and pressure, producing graded responses like phasic or tonic reception. These receptors exhibit adaptation and include examples like Pacinian corpuscles, statocysts, and inner/middle ear organs in vertebrates. Explore the Lobster Statocyst and Vertebrate Ear equilibrium and phonoreception organs that detect specific sound waves. Understand the role of Cochlea and Organ of Corti in sound reception.

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Understanding Mechanoreceptors: Sensory Responses in Sound and Pressure Perception

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  1. Mechanoreceptors • Respond to tactile stimuli, sound, vibrations, pressure • Produce graded response initially • Can be “phasic” or “tonic” receptors • Typically exhibit “adaptation” • Examples: Pacinian corpuscle; statocysts; inner/middle ear of vertebrates

  2. Pacinian Corpuscle

  3. Lobster Statocyst

  4. Vertebrate Ear: Equilibrium Organs

  5. Vertebrate Ear: Phonoreception Pinnacle of evolution as far as sound reception among animals is concerned Detect waves that exhibit certain frequencies and amplitude (nearby and at a distance) Involve external, middle and inner ear Two principle organs involved: Cochlea Organ of Corti

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