Hearing and equilbrum III

Question 1

What is ampulla?

Answer 1

-they are in each canal
-swollen region
-contains sensory receptors

Question 2

what is embeded in each ampulla?

Answer 2

stereocilia

Question 3

When rotation occurs in the plane of a canal, hair cells are stimulated by _______.

Answer 3

endolymph

Question 4

Where are APs from hair cells sent to?

Answer 4

the vestibulocochelar nerve, to pons, to auditory cortex

Question 5

What is gravity and linear accelation detected by?

Answer 5

the maculae in the vestibule

Question 6

explain where APs go for gravity and linear acceleration …

Answer 6

-generated by movment of hair cells
-sent along…
vestibulocochlear nerve—->pons–> cerebellum—>thalamus—>auditory cortex

Question 7

What are the 3 ducts in the cochlea and what fluid does each one contain?

Answer 7

1.Vestibuar duct–> perilymph
2.cochlear duct —>endolymph
3.tympanic duct —> perilymph

Question 8

sound is detected by hair cells in the organ of the _____ inside the cochlear duct.

Answer 8

Corti

Question 9

What is frequency (tone/pitch) determined by?

Answer 9

the part of the cochelar duct that is stimulated

Question 10

what is intensity (volume) determined by?

Answer 10

number of hair cells stimulated