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The following brain structures that contain pain receptors are


A) meninges on the surface of the brain only.
B) blood vessels in the brain only.
C) meninges on the surface of the brain and blood vessels in the brain.
D) neither meninges on the surface of the brain nor blood vessels in the brain.
E) nervous tissue in the brain.

F) C) and E)
G) A) and C)

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Proprioceptors provide sensory input that influences the sense of equilibrium.

A) True
B) False

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True

The ability of the nervous system to become less responsive to a maintained stimulus is called _____________.


A) immunity
B) sensory adaptation
C) accommodation
D) sensory deprivation

E) A) and B)
F) None of the above

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The visual disturbance and limb numbness a person with a migraine experiences is probably caused by


A) cerebral blood flow deficiency.
B) contraction of skeletal muscles associated with the scalp.
C) excess blood pulsating through cranial vessels.
D) vasodilation of cerebral vessels.
E) increased blood flow in the skin of the scalp.

F) B) and D)
G) A) and C)

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Referred pain occurs when the brain projects the sensation back to the original source in the body from which the pain originated.

A) True
B) False

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The fovea centralis contains a high concentration of rods.

A) True
B) False

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Taste receptors are


A) found only on the tongue.
B) unable to divide.
C) modified connective tissue cells.
D) modified epithelial cells.
E) found only on the cheeks and roof of the mouth.

F) A) and B)
G) C) and E)

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The utricle and saccule contain the sensory receptors associated primarily with the sense of dynamic equilibrium.

A) True
B) False

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When stimulated,what is the immediate response of the spiral organ's hair cells?


A) stimulation of motor neurons in the auditory nerve
B) formation of otoliths
C) release of neurotransmitter to sensory neurons
D) vibration of the auditory ossicles

E) B) and D)
F) A) and B)

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An artery and vein pass through the optic disc.

A) True
B) False

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Why is reading a book only possible when looking directly at the printed page?


A) Peripheral photoreceptors are not stimulated.
B) The printed image in focus is projected to the area of keenest vision.
C) The printed image in focus is projected to the area of highest concentration of cones.
D) both a and b
E) both b and c

F) A) and B)
G) A) and E)

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Worldwide,blindness is most commonly caused by changes in the


A) vascular tunic.
B) nervous tunic.
C) cornea.
D) lens.
E) sclera.

F) D) and E)
G) A) and E)

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Rods are photoreceptors that provide black and white vision.

A) True
B) False

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Blowing the nose improperly may cause an infection in the auditory tube to spread to the


A) outer ear.
B) middle ear.
C) inner ear.
D) cochlea.
E) auricle.

F) A) and B)
G) B) and C)

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Tears contain an enzyme that reduces the chances of developing an eye infection.

A) True
B) False

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In darkness or conditions of dim light,________ muscles of the iris are stimulated to contract,which ________ the pupil.


A) radial,dilates
B) circular,dilates
C) radial,constricts
D) circular,constricts

E) A) and B)
F) None of the above

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Where are olfactory receptors located?


A) in the olfactory bulbs
B) in the nasal sinuses
C) in the superior region of the nasal cavity

D) All of the above
E) A) and B)

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Olfactory receptor cells are best described as


A) connective tissue cells.
B) squamous epithelial cells.
C) columnar epithelial cells.
D) bipolar neurons.
E) modified smooth muscle cells.

F) A) and C)
G) C) and D)

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D

The optic disc,fovea centralis,and macula lutea are all structures found in this inner layer of the eye.


A) choroid
B) retina
C) sclera
D) vitreous body

E) C) and D)
F) None of the above

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B

The conjunctiva lines the inner surface of the eyelid and covers the anterior surface of the sclera.

A) True
B) False

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