Details

Title: !Fishes 2

Description: Sensory Perception: Structure and function of mechanoreception system: Pars inferior

Total Flash Cards: 9

Created: 11/10/2009 21:29:48

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Cards in this set:

Term
pars inferior
 Definition
lower portion of membranous labyrinth inner ear
Term
chambers
 Definition
3 distinct w/ otolith: utriculus, sacculus, lagena
Term
utriculus chamber
 Definition
contains lapillus (part of pars superior but more comfortably presented here)
Term
sacculus chamber
 Definition
contains sagitta
Term
lagena chamber
 Definition
contains asteriscus
Term
sensoty macula
 Definition
each otolith lies here; patch of hair cells
Term
within macula
 Definition
orientation of cilia varies, some localization of function implied
Term
otolith sensitive to linear acceleration
 Definition
sound, gravity, accelerations due to swimming; fish tissue transparent to displacement waves:body moves w/rest of water; heavier otoliths dont move in synch, hair cells stimulated
Term
otolith sound reception
 Definition
far field sounds cause them to vibrate over neuromasts arranged in macular bed; vibrations stimulate neuromasts; structures either more or less acoustically dense than water amplify sound