Hearing and equilbrum II Flashcards
What does this part of the INNER ear do?
Membranous labyrinth
collection of tubes filled with endolymoh. contains receptors for equilbrum and hearing
What does this part of the INNER ear do?
Bony labyrinth
shell of bone surronding the membranous labrinyth where a fluid called perilymph is found
What does this part of the bony labytinth do? (and its 2 parts)
Vestibule
Has two parts
1)utricle
2)Saccule
helps with sesnations of gravity and linear acceleration
What does this part of the bony labytinth do?
semicirccular canal
have semicircular ducts that are stimulated by the roation of the head
What does this part of the bony labytinth do?
cochlea
contains receptors that proide the sesne of hearing
Mechanoreceptors are hair cells. the free surface supports microvilli calles _____.
Sterocilia
explain steriocilia
movment of steriocilia distorts the hair cell surface.
In one direction it stimulates hair cells and in the other direction it inhibts hair cells
What is rotaional movement of the head detetced by?
The semicircular canals.
each one oriented on a different plane
What are the three semicircular canals?
-anterior/superior
-lateral
-posterior
Which duct does shaking head no stimulate?
lateral duct
which duct does nodding head yes stimulate?
the anterior/superior duct
Which duct does tilting head side to side stimulate?
the posterior duct
