Question 1

Rods, a type of photoreceptor cell, respond to light (stimulus)  by

Accepted Answer

A)   depolarizing.
B)   repolarizing.
C)   hypopolarizing.
D)   hyperpolarizing.
E)   opening Na+ channels in the plasma membrane.F) C) and D)
G) C) and E)

Question 2

Which molecule is activated from the binding of an odorant to transmembranous receptor molecules on olfactory hairs?

Accepted Answer

A)   cAMP
B)   Calmodulin
C)   Troponin
D)   G proteinE) A) and D)
F) B) and C)

Question 3

The ciliary body

Accepted Answer

A)   contains rods and cones.
B)   is continuous with the sclera.
C)   consists of a ciliary ring and ciliary processes.
D)   produces vitreous humor.
E)   is photosensitive.F) B) and D)
G) D) and E)

Question 4

Arrange the following events detailing the visual pathway in correct sequence:
(1)  Retinal cells generate action potential
(2)  Person becomes aware of the information obtained by CNS
(3)  Visual cortex translates action potential
(4)  Bright light is shone into the eye
(5)  Optic nerve conducts action potential to CNS

Accepted Answer

A)   4, 5, 1, 3, 2
B)   4, 1, 2, 3, 5
C)   4, 1, 5, 3, 2
D)   4, 2, 1, 5, 3
E)   4, 3, 5, 2, 1F) All of the above
G) A) and B) C

Question 5

Which type of taste has the lowest threshold?

Accepted Answer

A)   Sweet
B)   Bitter
C)   Salty
D)   Sour
E)   UmamiF) A) and E)
G) C) and E)

Question 6

What is a tastant?

Accepted Answer

A)   A substance dissolved in saliva that causes taste cells to depolarize.
B)   A cell found within a taste bud that depolarizes when stimulated.
C)   A structure found within the inner ear that translates vibration into sound.
D)   A supporting cell in the olfactory epithelium that connects the sensations of taste and olfaction.E) B) and D)
F) C) and D)

Question 7

In order for a molecule to be detected by the olfactory neurons, it must

Accepted Answer

A)   be present in high concentrations.
B)   be one of the seven primary classes of odors.
C)   be dissolved in fluid covering the olfactory epithelium.
D)   interact with the mechanoreceptors of the olfactory hair membrane.
E)   enter the nose slowly.F) B) and D)
G) C) and D)

Question 8

The contractile structure that surrounds the pupil is the ________.

Accepted Answer

A)   iris
B)   ciliary ring
C)   sclera
D)   ciliary muscle
E)   retinaF) A) and E)
G) A) and D)

Question 9

The point where light rays cross after passing through a concave lens is referred to as the ________.

Accepted Answer

A)   focal point
B)   depth of focus
C)   far point of vision
D)   near point of visionE) All of the above
F) B) and D)

Question 10

Lynn has an obstruction in her left lacrimal canaliculi. A result of this is that

Accepted Answer

A)   Lynn appears to be constantly crying but only from her left eye.
B)   Lynn's lacrimal glands decrease secretion.
C)   Lynn's pupils appear dilated continuously.
D)   Lynn has developed glaucoma.E) A) and B)
F) B) and C)

Question 11

Matthew has taken a "mental health day" from work. At this moment, the level or neurotransmitter released by the photoreceptors in his eyes is at maximum. What is Matthew likely doing right now?

Accepted Answer

A)   Matthew is sound asleep in a very dark room.
B)   Matthew is at the beach enjoying a bright sunny day.
C)   Matthew is in a quiet bookstore reading the newest issue of his favorite magazine.D) B) and C)
E) All of the above

Question 12

In a taste bud, which cell produces a receptor potential?

Accepted Answer

A)   Taste hairs
B)   Sensory nerve fibers
C)   Supporting cells
D)   Basal cells
E)   Taste cellsF) C) and D)
G) D) and E)

Question 13

The direction from which a sound is coming can be determined by the

Accepted Answer

A)   volume of the sound.
B)   frequency of sound waves.
C)   amplitude of the sound waves.
D)   differences in the time that sound waves take to reach each ear.
E)   timbre of sounds.F) A) and E)
G) A) and D)

Question 14

Cochlear neurons are stimulated by

Accepted Answer

A)   vibrating the oval window.
B)   vibrations of the tectorial membrane.
C)   bending microvilli or stereocilia on the hair cells.
D)   movement of the otoliths in the endolymph.
E)   turning the spiral organ.F) None of the above
G) B) and C)

Question 15

As an object moves closer to the eye,

Accepted Answer

A)   the lens flattens.
B)   the eyes rotate medially.
C)   the ciliary muscles relax.
D)   the diameter of the pupil increases.
E)   the eye blinks.F) C) and D)
G) B) and C) B

Question 16

Match the description of the disease or disorder of the eye with its correct name.
-Myopia

Accepted Answer

A)  Difficulty seeing distant objects
B)  A type of refractory error
C)  Clouding of the lens of the eye
D)  Increased intraocular pressure that can lead to loss of vision
E)  Loss of acute central visionF) A) and B)
G) C) and D)

Question 17

Tears

Accepted Answer

A)   are produced only when a person cries.
B)   wash foreign objects away from the eye.
C)   contain lysozyme to trap dust.
D)   are very acidic and kill microbes.
E)   contain little water.F) A) and B)
G) A) and C)

Question 18

Which part of the eye is referred to in the statement "Don't fire until you see the whites of their eyes"?

Accepted Answer

A)   Conjunctiva
B)   Choroid
C)   Retina
D)   Sclera
E)   PupilF) A) and D)
G) None of the above D

Question 19

The photoreceptors in the photoreceptor layer of the retina face the vitreous chamber.

Accepted Answer

A) True 
 B)False

Question 20

To focus on objects closer than 20 feet,

Accepted Answer

A)   the lens must become flatter.
B)   the cornea must move inward.
C)   the ciliary muscles must contract.
D)   the suspensory ligaments increase tension on the lens.
E)   the retina must bend.F) A) and D)
G) B) and C)

Exam 15: The Special Senses

Rods, a type of photoreceptor cell, respond to light (stimulus) by

Correct Answer
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Which molecule is activated from the binding of an odorant to transmembranous receptor molecules on olfactory hairs?

Correct Answer
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The ciliary body

Correct Answer
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C

Which type of taste has the lowest threshold?

Correct Answer
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What is a tastant?

Correct Answer
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In order for a molecule to be detected by the olfactory neurons, it must

Correct Answer
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The contractile structure that surrounds the pupil is the ________.

Correct Answer
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The point where light rays cross after passing through a concave lens is referred to as the ________.

Correct Answer
verified

Lynn has an obstruction in her left lacrimal canaliculi. A result of this is that

Correct Answer
verified

Matthew has taken a "mental health day" from work. At this moment, the level or neurotransmitter released by the photoreceptors in his eyes is at maximum. What is Matthew likely doing right now?

Correct Answer
verified

In a taste bud, which cell produces a receptor potential?

Correct Answer
verified

The direction from which a sound is coming can be determined by the

Correct Answer
verified

Cochlear neurons are stimulated by

Correct Answer
verified

As an object moves closer to the eye,

Correct Answer
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B

Match the description of the disease or disorder of the eye with its correct name. -Myopia

Correct Answer
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Tears

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Which part of the eye is referred to in the statement "Don't fire until you see the whites of their eyes"?

Correct Answer
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D

The photoreceptors in the photoreceptor layer of the retina face the vitreous chamber.

Correct Answer
verified

To focus on objects closer than 20 feet,

Correct Answer
verified

Exam 15: The Special Senses

Rods, a type of photoreceptor cell, respond to light (stimulus) by

Correct AnswerverifiedShow Answer

Which molecule is activated from the binding of an odorant to transmembranous receptor molecules on olfactory hairs?

Correct AnswerverifiedShow Answer

The ciliary body

Correct AnswerverifiedShow Answer

Correct AnswerverifiedC

Which type of taste has the lowest threshold?

Correct AnswerverifiedShow Answer

What is a tastant?

Correct AnswerverifiedShow Answer

In order for a molecule to be detected by the olfactory neurons, it must

Correct AnswerverifiedShow Answer

The contractile structure that surrounds the pupil is the ________.

Correct AnswerverifiedShow Answer

The point where light rays cross after passing through a concave lens is referred to as the ________.

Correct AnswerverifiedShow Answer

Lynn has an obstruction in her left lacrimal canaliculi. A result of this is that

Correct AnswerverifiedShow Answer

Matthew has taken a "mental health day" from work. At this moment, the level or neurotransmitter released by the photoreceptors in his eyes is at maximum. What is Matthew likely doing right now?

Correct AnswerverifiedShow Answer

In a taste bud, which cell produces a receptor potential?

Correct AnswerverifiedShow Answer

The direction from which a sound is coming can be determined by the

Correct AnswerverifiedShow Answer

Cochlear neurons are stimulated by

Correct AnswerverifiedShow Answer

As an object moves closer to the eye,

Correct AnswerverifiedB

Match the description of the disease or disorder of the eye with its correct name. -Myopia

Correct AnswerverifiedShow Answer

Tears

Correct AnswerverifiedShow Answer

Which part of the eye is referred to in the statement "Don't fire until you see the whites of their eyes"?

Correct AnswerverifiedD

The photoreceptors in the photoreceptor layer of the retina face the vitreous chamber.

Correct AnswerverifiedShow Answer

To focus on objects closer than 20 feet,

Correct AnswerverifiedShow Answer

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C

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B

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D

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