BIOL 306 Study Guide - Midterm Guide: Electric Field, Single-Photon Emission Computed Tomography, Aroma Compound
27 Feb 2014
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Individuals are tuned to song pattern of their species. Sound is amplified and filtered by wing structures. Flatwing males make no sound, so parasitoid flies cannot find them. Rub hind legs with teeth on wings. Pressure difference ear helps generate larger amplitude difference through constructive and destructive interference. An4 counting neuron responds poorly to gap-filled songs. Hears through: sensory neurons (bulla acoustica, eardrum (prosternal tympanal membrane) Fly enhances binaural difference through # of responding neurons. Hearing evolved twice through the elaboration of a cuticular structure to detect sound, although all flies have a chordotonal organ: stretch/vibration receptor. Amplitude modulation helps frogs select their species from others. Auditory nerve phase locks to stimulus frequency. Torus semicircularis: loss of phase locking, am tuning! Each neuron responds to a specific am rate, a frog will have more neurons tuned to its species rate. Neurons also count pluses before they respond.
