Animal Behavi26 - Animal Behavior: Instinct...

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Animal Behavior: Instinct Mechanoreceptors and Hearing Many arthropods have vibration sensitive hairs in their limb joints. Tactile sensations can be propagated via hairs or by the deformation of skin neurons. Such neurons are called mechanoreceptors. These receptors are also involved in hearing. Sound waves are propagated by vibrations of air or water molecules. Small changes in pressure that result from these vibrations are detected by mechanoreceptors that can rapidly adapt, and so are sensitive to sound vibrations. The silkworm moth has one of the simplest types of auditory systems, which converts sound pressure waves into vibratory motion. These moths have two simple ears, each consisting of a tympanic membrane and two receptors imbedded in connective tissue. There are two tympanic membranes on either side of the thorax that transmit sound waves from the environment to the receptors; each receives different sound intensities. The A1 receptor cell detects low-intensity sounds. The frequency of the impulse from the A1 cell, or the rapidity with which it fires, is
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This note was uploaded on 01/27/2012 for the course BIOLOGY BSC1005 taught by Professor Rodriguez during the Winter '09 term at Broward College.

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Animal Behavi26 - Animal Behavior: Instinct...

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