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

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A cochlear implant treats


A) a torn tympanic membrane.
B) otosclerosis.
C) conductive deafness.
D) sensorineural deafness.

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

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A person who is colorblind lacks


A) retinas.
B) one type of photopigment.
C) corneas.
D) a gene that encodes the proteins in rod cells.

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

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Impulses from taste receptors can travel in the facial,glossopharyngeal,and vagus nerves.

A) True
B) False

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In hyperopia,the eyeball is too short and the focal point is in front of the retina.

A) True
B) False

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The lens of the eye thickens when the


A) suspensory ligaments pull on the lens capsule.
B) ciliary processes relax.
C) ciliary muscles relax.
D) ciliary muscles contract.

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

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The transparent,anterior portion of the eye's outer tunic is called the _________ .

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The taste receptor that amino acids such as glutamic acid activate is


A) sour.
B) salty.
C) bitter.
D) umami.

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

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Lorelei thinks of the days of the week and months of the year as particular colors.She has


A) synesthesiA.
B) neuropathy.
C) a deficiency of neurons in her visual cortex.
D) too few synapses in her hypothalamus.

E) B) and C)
F) C) and D)

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Pain impulses are first processed in the


A) gray matter of the posterior horn.
B) motor cortex of the cerebrum.
C) dorsal root ganglion.
D) cerebral cortex.

E) C) and D)
F) All of the above

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Optic nerve fibers cross over in the thalamus.

A) True
B) False

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Anosmia is loss of


A) taste.
B) smell.
C) hearing.
D) vision.

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

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Olfactory receptors,which provide the sense of smell,are


A) thermoreceptors.
B) mechanoreceptors.
C) chemoreceptors.
D) proprioceptors.

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

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Arnold enters a darkened movie theater on a sunny summer afternoon.It takes many minutes for his eyes to adapt to the darkness because


A) it takes some time for the retina to rebuild its rhodopsin stores from opsin and retinal.
B) the rods in the eye work only in bright light,and it takes time for the cones to work in weak light.
C) the iris takes time to close after being subjected to bright light.
D) the optic nerve fatigues in bright light,and it takes time to recover.

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

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Visual sensations from images focused on the side of the retina are blurred because


A) there are no rods in this region.
B) there are more cones than rods in this region.
C) there are more rods than cones in this region.
D) the optic disc is located on the side of the retina.

E) A) and D)
F) A) and C)

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Which of the following is not a primary taste sensation?


A) Sweet
B) Salty
C) Pungent
D) Sour

E) A) and C)
F) C) and D)

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Another name for pain receptors is


A) tactile corpuscles.
B) lamellated corpuscles.
C) nociceptors.
D) mechanoreceptors.

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

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Pain receptors differ from other somatic receptors by


A) being stimulated only when pain comes from skeletal muscle.
B) adapting very little,if at all.
C) not being able to project impulses back to their origin.
D) adapting much more than other receptors.

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

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Stretching of tissues can cause pain sensations to arise from visceral organs.

A) True
B) False

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Receptors for the special senses are found


A) primarily in the head.
B) throughout the integumentary system.
C) in the fingertips.
D) in internal organs.

E) B) and C)
F) All of the above

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