special senses-anatomy
Terms
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- the purpose of the eye is to gather light from the environment and forma n image on cells of the ___
- retina
- the nerve that carries impulses from the eye to the brain is the ___
- optic nerve
- the inner coat of the posterior wall of the eye is composed of the ____
- retina
- the outer wall of the eye consists of the cornea and the ___
- sclera
- the thin, watery fluid in the anterior chamber of the eye is called _____
- aqueous humor
- the jellylike substance that fills the posterior cavity of the eye is called ___
- vitreous humor
- the posterior chamber of the eye lies between the iris and the ___
- lens
- the iris is composed of two layers of ___
- smooth muscle
- the pupil of the eye is an opening in the portion of the eye knowns as the ___
- iris
- the transparent biconcave lens is found behind the ____
- pupil
- the suspensory ligament attaches the lens to the structure called the ___
- ciliary body
- the bervous layer of the retina consists o three layers of ___
- neurons
- the eyelids are covered on their surfaces by the mucous membrane called the ___
- conjunctiva
- tears that bathe the eyeball and keep it moist are produced by the ____
- lacrimal apparatus
- twilight vision is concerned with those retinal cells known as ___
- rods
- 16. daylight vision and close, detailed vision are permitted by those retinal cells known as _____
- cones
- 17.the place where most cones are concentrated is the ___
- fovea centralis
- 18. the retinal cells in their greatest number at the outer edge of the retina are ___
- rods
- 19. the optic disc contains no visual receptors and is therefore called the ___
- blindspot
- 20. the lobe of the brain where visual patterns are interpreted is the ____
- occipital
- 21. the process of light focusing due to the elasticity of the lens is called the ___
- accommodation
- 22. the change of lens shape to focus objects at various distances i under the control of a muscle called the ___
- ciliary muscle
- 23. persons having a condition in which the two eyes do not work together in a coordinated way suffer from ___
- strabismus
- 24. the correct term for nearsightedness is ____
- myopia
- 25. nearsightedness can be corrected by utilizing glasses having lenses that are ___
- biconcave
- 26. the condition of farsightedness is correctly known as ___
- hypertopia
- 27. farsightedness can be corrected with glasses having lenses that are ___
- biconvex
- 28. irregular curvature of the lens or cornea results in a disorder known as ___
- astigmitism
- 29. the sex-linked genetic trait in which a person cannot detect certain colors is called ___
- colorblindness
- 30. the major lobe of the brain in which hearing perception occurs is the ___
- temperal lobe
- 31. the technical name for the eardrum is the ___
- tympanic membrane
- 32. the middle ear bones, which transmit sound to the inner ear, are known as the malleus, incus, and the ___
- stapes
- 33. the long, slender tube leading from the pharynx to the middle ear is the ___
- eustachian tube
- 34. the snail-like structure of the internal ear is called the ___
- cochlea
- 35. three qualities of sound waves are intensity, pitch, and ___
- timbre
- 36. sound waves are transmitted from the middle ear bones to the membrane of the cochlea beneath the stapes called the ___
- oval window
- 37. in the cochlea, hair cells detect sound-produced pressure changes in a structure called the ___
- organ of corti
- 38. sound-induced nerve impulses are transmitted to the brain for interpretation over the cochlear branch of the nerve called the ___
- vestibulocochlear nerve
-
1. the outer layer of the wall of the eye is composed of the:
a)iris and ciliary bodies
b)retina
c)cornea & sclera
d)rod cells & cone cells - C
-
2. the vitreous humor of the eye may be found between the;
a) iris & lens
b) pupil & iris
c) retina & fovea
d) lens & retina - D
-
3. the iris is composed of:
a) pigmented blood vessels
b) 2 layers of smooth muscle
c) nerve cells
d) connective tissue cells called astrocytes - B
-
4. the color of a person's eyes depends upon which pigments are contained in the:
a) iris b) retina c) sclera
d) cornea - A
-
5. all the following are components of the retina of the eye except:
a)bipolar neurons
b) ganglionic neurons
c) cone cells
d) ciliary muscles - D
-
6. The conjunctiva is a mucous membrane that:
a) covers the sclera & extends to the retina
b)covers the eyeball & lines the eyelids
c) covers the rod cells but not the cone cells
d) is found only in the posterior chamber of th - B
-
tears are produced by a set of glands next to the eyeball and known as the:
a) ethmoid glands
b) lacrimal glands
c) submandibular glands
d) suspensory glands - B
-
8> the rod shaped cells of the retina permit vision:
a) where there is a large amount of light
b) in color
c) where there is dim light
d) only at the fovea - C
-
the highest concentation of cone-shaped cells is at the:
a)ciliary body
b) iris
c)fovea centralis
d) temporal lobe - C
-
10. the highest concentration of rod-shaped cells is at the:
a) suspensory ligament
b) outer edge of the retina
c) occipital lobe
d) blind spot - B
-
11. an inverted image is converted into an upright image at the:
a)temporal lobe of the brain
b) blind spot
c)occipital lobe of the brain
d) optic disk - C
-
12. the process of accommodation is due to the:
a)changing shape of the lens
b) replacement of cone cells by rod cells
c) formation of images in front of the retina
d) development of color blindness - A
-
13. persons having the condition called strabismus have a condition in which:
a) they cannot see red or green color
b) light rays focus behind the retina
c) the optic disk is damaged
d) the eyes do not work in a coordinated fashion - D
-
14. a person who suffers from nearsightedness can be assisted by glasses having:
a)flat lenses
b) biconves lenses
c) biconcave lenses
d) lenses that bring images together - C
-
15. a person suffering from farsightedness can be helped by wearing glasses that have:
a)biconvex lenses
b) biconcave lenses
c) flat lenses
d) lenses that bring images together - A
-
16. in a person who is farsighted:
a)the image forms in front of the retina
b) no image forms
c) the image forms behind the retina
d) the eyes are cross-eyed - C
-
Color blindness is the result of:
a)injury to the eye
b)genetic trait
c)astigmatism
d)poorly fitted glasses - B
-
18. all the following are pars of the outer ear except a) the tympanic membrane
b) the pinna
c) the external auditory canal
d) the ear ossicles - D
-
19. the eustachian tube leads from the:
a)middle ear to the inner ear
b)pinna to the cochlea
c)cochlea to the semicircular canals
d) pharynx to the inner ear - D
-
20. all the following are characteristics of sound waves except:
a)intensity
b)timbre
c)refraction
d)pitch - C
-
21. sound vibrations are conducted from the stapes to the perilympg of t he cochlea by the:
a)oval window
b)organ of corti
c)bipolar neurons
d)pinna - A
- the nerve that transmits impulses from the eye to the brain is the _______ nerve
- optic
- T or F?the (inner)layer of the eyeball is a highly vascular layer consisting of the choroid layer, iris, and ciliary bodies
- middle
- T or F?the two components of the outer layer of the eyeball are the cornea and the (retina)
- sclera
- the posterior chamber of the eye is found between the iris and the (retina)
- lens
- two layers of (straited) muscle compose the iris
- smooth
- the lens is a trasparent (biconcave) disc of fibrous protein material occurring in concentric layers.
- biconves
- the (suspensory ligament)attaches the lens to the ciliary body.
- suspensory ligament
- the neurons that receive impuses initiated by rod and cone cells are (unipolar) neurons
- bipolar
- the mucous membrane folded over part of the eyeball and lining the eyelid is the (conjunctiva)
- conjunctiva
- tears are produced in the eye to bathe the eyeball by the (nasal) apparatus.
- lacrimal
- the (rod) cells permit close, detailed vision and are concerned with color vision.
- cone
- cone cells are highly concentrated in the (fovea centralis), a small indentation near the posterior portion of the center of the retina.
- true
- the number of rod cells (decreases) as the distance from the fovea centralis increases
- increases
- the principal structure for focusing light rays on the retina is the (iris)
- lens
- the (intrinsic) muscles of the eye are responsible for eyeball movements that help one see a single, three-dimensional image.
- extrinsic
- the condition called astigmatism is due to an irregular curvature of the lens or ___
- cornea
- the major site for hearing perception in the brain is the temporal lobe of the (cerebellum)
- cerebrum
- the three middle ear bones that transmit sound waves are known as the malleus, (ethmoid), and stapes
- incus
- the eustachian tube leading to the (inner) ear helps maintain air pressure on both sides of the eardrum.
- middle
- the intensity of sound waves is usually expressed in (decibels)
- true
- perilymph vibrations in the inner ear are transmitted to dendrites located in the (organ of corti) in the cochlea
- true