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L9&10 Physiology of Hearing, taste and smell sensation

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 L9&10 Physiology of Hearing, taste and smell sensation






MCQ

1.methods of sound trasmision :


a. air conduction
b. bone conduction
c.all of the above
d.none of the above

2.in air conduction the vibration of skull bones trasmitted directly to
bony cochlea causing perilymph vibration ?


3.about the transmission of sound waves in the outer and middle ear
..the sound waves delivered to the inner ear are ampilified about ..

a. 2 thimes
b. 22 times
c. 222 times
d. 2222 times


4.the ... act as a funnel in the outer and middle ears

a. ossicles
b. auricle
c. oval window
d. none of the above

5.the ... act as lever system in the outer and middle ears


a. ossicles
b. auricle
c. oval window
d. none of the above

6.the oval window has only about ... the area of the tympanic
membrane

a. 17/1
b. 19/1
c.1/17
d.1/17
1.c 2.b 3.b
4.b 5.a. 6.d

7.the oval window has only about ... the area of the tympanic
membrane

a. 19/1
b. 17/1
c. 2/34
d.none of the above


8. attenuation of sound transmission by middle ear muscles is a reflex

contraction of
a. tensor tympani
b. stapedius
c. (a+b)
d. none of the above


9. prolonged exposure to loud sounds still can result in hearing
impairment ?


10. movement of the basilar membrane occurs due to transimission of the reflected waves in scale tympani ?


11. movement of the basilar membrane occurs due to transimission of the waves in the perilymph of scale vestibuli ?


12. the outer hair cells are mainly concerned with regulation of the
sensitivity of inner hair cells through special neural reflexes?


13. bending of the hairs in one direction towards kinocilium ... the
hair cell and bending them in the opposite direction ... it

a. hyperpolarizes .. depolarizes
b. depolarizes .. hyperpolarizes
c.hyperpolarizes ..hyperpolarizes
d. depolarizes .. hyperpolarizes

14.movement of stereocilia towards kinocilium causes opening of
mechanosensitive k+ channels ?


15. the basilar membrane consists of ...

a. 2000000
b. 200000
c.20000
d.2000

16. taste receptors are clustered to form a number of taste buds wich
present on the surface of ...

a. tongue
b. sof palate and epiglottis
c. pharynx
d. all of the above

17. ... on the dorsum of the tongue anteriorly and stimulated by nacl

a. sweet taste
b. salt taste
c. sour taste
d. bitter taste
e. umami (delicious) taste

18. ... mainly felt at the tip of tongue stimulated by sucrose and
glucose

a. sweet taste
b. salt taste
c. sour taste
d. bitter taste
e. umami (delicious) taste


19. ... on the back of the tongue stimulated by nicotine and quinine

a. sweet taste
b. salt taste
c. sour taste
d. bitter taste
e. umami (delicious) taste

20. along the tongue edges stimulated by H+

a. sweet taste
b. salt taste
c. sour taste
d. bitter taste
e. umami (delicious) taste


21. stimulated by food containing l-glutamate like meat,extracts,aging
cheese

a. sweet taste
b. salt taste
c. sour taste
d. bitter taste
e. umami (delicious) taste


22.olfactory mucous membrane is formed of ..

a. receptor neurons
b. supporting cells
c. regenerative basal cells
d. goblet cells
e. all of the above

23. olfactory receptor neurons are unipolar nerve cells ?


24. olfactory receptor neurons are bipolar nerve cells ?


25. each odorant activates a specific g-protein in olfactory receptor
neurons ?


Answers

    1c.    2.false.    3.b.    4.b.   5.a.    6.d     7.c  8.c 
   9.true    10.false.   11.true.  12.true
 13.d 
 14true   15.b    16.d    17.b.   18.a  19.d    20.c.    21.e      22.e. 
  23.false    24.true.  25.true





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