5. Type 1 afferents in the acoustic parasitoid fly Ormia ochracea a) b) c) d) ar

Question

5. Type 1 afferents in the acoustic parasitoid fly Ormia ochracea a) b) c) d) are the most common type of auditory receptor cells in Ormia. increases in spike rate in response to an increase in stimulus intensity. exhibits shorter response latencies to a contralateral sound compared to an ipsilateral sound. only responds with a single spike regardless of stimulus duration. 6. Select the correct sequence of nuclei for sound ascending the auditory pathway in frogs: a) VIII nerve > dorsal medullary nucleus ->primary thalmic nucleus> inferior colliculus b) VIll nerve - primary thalmic nucleus - dorsal medullary nucleus inferior colliculus> c) VIII nerve inferior colliculus > primary thalmic nucleus -> dorsal medullary nucleus d) VIlI nerve -> dorsal medullary nucleus superior olivary nucleus -> inferior colliculus -> superior olivary nucleus superior olivary nucleus superior olivary nucleus primary thalmic nucleus 7. In mammalian ears sound intensity is encoded by: a) the position of an activated hair cell along the basilar membrane of the cochlea b) the firing rate of downstream spiral ganglion neurons c) the position of the termination of a specific spiral ganglion neuron on the hair cell. d) e) a and b b and c 8. In both owls and mammals, interaural time and level differences permit sound localization via an auditory spatial map at the level of the a) cochlear nuclei b) nucleus laminaris/superior olivary nucleus. c) inferior colliculus d) thalamus e) primary auditory cortex. 9. A neuron that is low-pass with a cut-off amplitude modulation rate of 50 Hz a) selectively responds to sinusoidal sounds with a modulation rate above 50 Hz. b) only responds to (and is tuned to) sinusoidal sounds with a modulation rate around 50 Hz. c) is not selective. d) selectively responds to sinusoidal sounds with a modulation rate below 50 Hz

Explanation / Answer

5)Type 1 afferent in the acoustic parasitoid fly ormia ochracea( option d) only responds with a single spike regardless of the stimulus duration. 6)(option 1) 7)In mamalian ears sound intensity is encoded by:(option c). 8)option c. 9)option a

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