Details

Title: !Fishes 2

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

Total Flash Cards: 6

Created: 11/10/2009 21:23:21

New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE.

Existing Users: CLICK HERE.

Additional Biology Flashcards

Cards in this set:

Term
pars superior
 Definition
upper portion of membranous labyrinth of inner ear
Term
function
 Definition
sensitive to angular accelerations(rotations): maintains equilibrium and orientation
Term
composition
 Definition
semicircular canals filled w/ endolymph
Term
semicircular canals w/ ampulla
 Definition
inside is organ made of cupula and hair cells; cupula occludes ampulla; endolymph movement deforms cupula -> stimulates hair cells
Term
jawed fishes: 3 semicircular canals
 Definition
oriented in perpendicular planes; sensitive to pitch, roll, yaw; each angular movement cases flow of endolymph relative to one canal
Term
semicircular canals in jawless fishes
 Definition
fewer; 2 in lamprey, 1 in hagfish; these fish must be less discriminating of diff angular accelerations