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PRACTICE QUIZ
CHAPTER FIFTEEN
1.
Which of the three papillae lacks taste buds? _________________________________________________
2.
The three cranial nerves that transmit gustatory impulses are the _________________, ________________,
and __________________________.
3.
All three nerves transmitting gustatory impulses travel through the ___________________ and is why gag
and vomiting reflexes are triggered when we experiences something distasteful.
4.
The primary gustatory area is located in which part of the brain? __________________________________
5.
In order for a substance to be detected by a taste bud, the substance must first be _____________________.
6.
A taste bud is composed of three cell types. Name them. _________________, __________________, and
___________________________.
7.
Which of the three cell types releases neurotransmitters? ________________________________________.
8.
A human is able to distinguish five different tastes which include: _______________, ________________,
______________, ______________, and ________________.
9.
The loss of taste sensation is called _________________________________________________________.
10. The main difference between gustatory receptor cells and olfactory receptor cells is that _______________
______________________________________________________________________________________
11. Nasal mucus is produced by ______________________________________________________________
12. Olfactory neurons are frequently replaced because their lifespan is only about _________________ days.
13. Olfactory neurons synapse with mitral cells within complex structures called ______________________.
14. A bundle of mitral cell axons form _________________________ which extend from the olfactory bulbs.
15. Olfactory sensation reaches the brain via which cranial nerve? ____________________________________
16. Brain disorders can distort the sense of smell so that olfactory hallucinations occur. Transient __________
_____________________ occur in some epileptics just before they have a seizure.
17. The corner of the eye next to the nose is called the ________________________________ and it possesses
a fleshy elevation called the _________________________________________.
18. The muscle responsible for raising the eyelids is called the ________________________________muscle.
19. List in order the flow of tears from the lacrimal gland to the nasal cavity. ___________________________
_____________________________________________________________________________________.
20. Name the three nerves that innervate the extrinsic eye muscles. _________________, ________________,
and ________________________________.
21. The dense connective tissue forming the “white” of the eye and is continuous with the dura mater of the
brain is called ___________________________.
22. “Bloodshot eyes” are the result of dilation of blood vessels in the ________________________________.
23. Photoreceptors are located within the nervous coat also called the ________________________________.
24. The capillaries of the ciliary processes produce ______________________ which leaves the eye through
the canals of ____________________________.
25. The hole in the center of the iris through which light passes is called the ___________________________.
26. The posterior chamber possesses a fluid made during embryonic development called _________________.
27. The vascular tunic of the eyeball is made of a highly vascularized, brown pigmented layer called the
_________________________________.
28. At the posterior pole of the eye is an oval region called the ______________________________________.
29. The more numerous _____________________ are photoreceptors used for dim-light and peripheral vision.
30. The eye and olfactory epithelium possess specialized neurons that have only a single dendrite and an axon.
This type of neuron is called ______________________________.
31. The cornea is avascular. It receives most of its nutrients from the __________________________ within
the anterior chamber.
32. The bending of light rays by the lens is called ________________________________________________.
33. The scientific name for nearsightedness is __________________________ and it is the result of the eyeball
being too ______________________________.
34. The scientific name for farsightedness is ___________________________ and it is the result of the eyeball
being too _______________________________.
35. When fixating on close objects, our eyes _________________________.
36. The X-shaped structure at the base of the brain where visual images cross over to the opposite side of the
brain is called the ________________________________________.
37. Which cranial nerve transmits sensory information from the eye? ________________________________
38. When light levels are low, the pupils will ___________________________. This is regulated by the
__________________________________ nervous system.
39. The external ear canal is lined with many modified sweat glands called ______________________ glands.
These glands produce earwax.
40. The external auditory meatus and the middle ear are separated by the ____________________________.
41. The middle ear and the nasopharynx are connected by the ____________________________ tube which
helps to regulate pressures within the ear.
42. The three ossicles in order are: _________________, _________________, and _________________.
43. Endolymph is a fluid that fills the ________________________________________________ labyrinth.
44. The three channels of the cochlea are the ____________________, the ____________________, and the
____________________________.
45. The _______________________________ membrane separates the cochlear duct from the scala tympani.
46. The _________________________________ membrane must contact the spiral organ of Corti to generate
a nerve impulse.
47. Movements of the _____________________ of hair cells in the utricle and Saccule initiate depolarizing
receptor potentials.
48. Semicircular canals are associated with ____________________________________________ equilibrium.
49. Ringing of the ears is called _______________________________________________________________.
50. An earache is called ____________________________________________________________________.