Question 1

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. 
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. B

Question 2

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)  Pupil 
A)  Conjunctiva 
B)  Choroid 
C)  Retina 
D)  Sclera 
E)  Pupil D

Question 3

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, 1 
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, 1 C

Question 4

Which type of taste has the lowest threshold?

Accepted Answer

A)  Sweet 
B)  Bitter 
C)  Salty 
D)  Sour 
E)  Umami 
A)  Sweet 
B)  Bitter 
C)  Salty 
D)  Sour 
E)  Umami

Question 5

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 protein 
A)  cAMP 
B)  Calmodulin 
C)  Troponin 
D)  G protein

Question 6

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. 
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.

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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. 
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.

Question 9

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. 
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.

Question 10

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. 
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.

Question 11

The contractile structure that surrounds the pupil is the ________.

Accepted Answer

A)  iris 
B)  ciliary ring 
C)  sclera 
D)  ciliary muscle 
E)  retina 
A)  iris 
B)  ciliary ring 
C)  sclera 
D)  ciliary muscle 
E)  retina

Question 12

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

Question 13

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. 
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.

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. 
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.

Question 15

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 vision 
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 vision

Question 16

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

Question 17

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. 
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.

Question 18

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. 
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.

Question 19

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. 
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.

Question 20

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 vision 
A)  focal point 
B)  depth of focus 
C)  far point of vision 
D)  near point of vision

Exam 15: The Special Senses

As an object moves closer to the eye,

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

Which type of taste has the lowest threshold?

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

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?

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

What is a tastant?

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

The ciliary body

The contractile structure that surrounds the pupil is the ________.

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

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

Cochlear neurons are stimulated by

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

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

To focus on objects closer than 20 feet,

Tears

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

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

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