Question 1

The iris consists of layers of ____________________ and ____________________ smooth muscle fibers.

Accepted Answer

The answer of The iris consists of layers of ____________________...

Question 2

A receptor cell initially develops a generator potential by the influx of potassium.

Accepted Answer

A) True 
 B)False

Question 3

Which statement is false?

Accepted Answer

A) Sound waves are produced by a disturbance pattern in air molecules. 
B) Sound waves gradually dissipate as they travel from the original sound source. 
C) Long sound waves vibrate more hair cells near the oval window than near the helicotrema. 
D) A sound at 60 decibels will always be louder than a sound at 50 cycles per second. 
E) Sound waves vibrate perilymph before they vibrate endolymph.

Question 4

During dark adaptation,

Accepted Answer

A) photopigments are gradually regenerated 
B) rhodopsin is rapidly broken down 
C) the sensitivity of the photoreceptors is reduced so that the image appears dim 
D) the bipolar cells are no longer inhibited 
E) only b and c occur

Question 5

Indicate the proper sequence of involvement in the visual pathway by writing the appropriate letter in the blank, using the answer code below.
 (a) bipalar neurans
(b) aptic nerve
(c) lateral geniculate nucleus
(d) rads and canes
(e) visural cortex
(f) aptic tracts
(g) ganglian cells
(h) aptic radiations 
 ______First
______Secand
______Third
______Faurth
______Fifth
______Sixth
______Seventh
_______Eighth

Accepted Answer

The answer of Indicate the proper sequence of involvement in...

Question 6

Compare and contrast the transduction process for taste and olfaction.Include the following in your answer: papillae, taste cells, taste bud, tastant, olfactory neurons, G protein, odorant, mitral cells, and second messenger.

Accepted Answer

The answer of Compare and contrast the transduction process for...

Question 7

Which of the following helps reduce internal reflection (scattering of light within the eye)?

Accepted Answer

A) sclera 
B) choroid 
C) blind spot 
D) lens 
E) iris

Question 8

In hyperopia the far source is focused on the retina with accommodation and the near source is focused behind the retina.

Accepted Answer

A) True 
 B)False

Question 9

Indicate the properties of rods and cones using the following answer code:
a.rods
b.cones
c.both rods and cones
-Little convergence in pathways

Accepted Answer

The answer of Indicate the properties of rods and cones...

Question 10

Indicate the properties of rods and cones using the following answer code:
a.rods
b.cones
c.both rods and cones
-Confer color vision

Accepted Answer

The answer of Indicate the properties of rods and cones...

Question 11

Only a few types of efferent neurons can function as receptors.

Accepted Answer

A) True 
 B)False

Question 12

Indicate the properties associated with each type of nociceptor by using the answer code below:
a.mechanical nociceptor
b.thermal nociceptor
c.polymodal nociceptor
d.mechanical nociceptor and thermal nociceptor
-Transmits its signals via C fibers

Accepted Answer

The answer of Indicate the properties associated with each type...

Question 13

Identify the true statement(s) about sensory receptors:

Accepted Answer

A) The larger the receptor potential, the greater the frequency of action potentials initiated in the afferent neuron. 
B) Tonic receptors often exhibit an "off-response." 
C) Phasic receptors are important in situations where maintained information about a stimulus is valuable. 
D) Receptor adaptation results from nerve fatigue. 
E) Receptors are part of efferent neurons.

Question 14

Receptor potentials

Accepted Answer

A) are always depolarizations 
B) are graded potentials 
C) have refractory periods 
D) are always action potentials 
E) are not any of the above

Question 15

Light is a form of electromagnetic radiation composed of particle-like individual packets of energy called ____________________ that travel in wavelike fashion.

Accepted Answer

The answer of Light is a form of electromagnetic radiation...

Question 16

Visual and hearing receptors are irreplaceable, but taste and olfactory receptors are continuously renewed.

Accepted Answer

A) True 
 B)False

Question 17

The three types of cones are

Accepted Answer

A) black, red, and white 
B) blue, green, and red 
C) blue, green, and white 
D) green, orange, and yellow 
E) orange, yellow, and white

Question 18

Match the following eye disorder with its description.
a.color blindness
b.night blindness
c.glaucoma
d.hyperopia
e.diplopia
f.presbyopia
g.myopia
h.cataract
i.astigmatism
-Lack of a cone type

Accepted Answer

The answer of Match the following eye disorder with its...

Question 19

Which of the following activities occurs in the presence of light within the phototransduction pathway?

Accepted Answer

A) Ganglion cells stimulate bipolar cells. 
B) cGMP levels increase within photoreceptors. 
C) Bipolar cells produce graded potentials. 
D) Sodium channels open in photoreceptors. 
E) None of the above.

Question 20

Each sensory neuron responds to stimulus information within its ____________________, which is a circumscribed region of the skin surface surrounding it.

Accepted Answer

The answer of Each sensory neuron responds to stimulus information...

Exam 6: The Peripheral Nervous System: Afferent Division Special Senses

The iris consists of layers of and smooth muscle fibers.

A receptor cell initially develops a generator potential by the influx of potassium.

Which statement is false?

During dark adaptation,

Compare and contrast the transduction process for taste and olfaction.Include the following in your answer: papillae, taste cells, taste bud, tastant, olfactory neurons, G protein, odorant, mitral cells, and second messenger.

Which of the following helps reduce internal reflection (scattering of light within the eye) ?

In hyperopia the far source is focused on the retina with accommodation and the near source is focused behind the retina.

Indicate the properties of rods and cones using the following answer code: a.rods b.cones c.both rods and cones -Little convergence in pathways

Indicate the properties of rods and cones using the following answer code: a.rods b.cones c.both rods and cones -Confer color vision

Only a few types of efferent neurons can function as receptors.

Indicate the properties associated with each type of nociceptor by using the answer code below: a.mechanical nociceptor b.thermal nociceptor c.polymodal nociceptor d.mechanical nociceptor and thermal nociceptor -Transmits its signals via C fibers

Identify the true statement(s) about sensory receptors:

Receptor potentials

Light is a form of electromagnetic radiation composed of particle-like individual packets of energy called ____________________ that travel in wavelike fashion.

Visual and hearing receptors are irreplaceable, but taste and olfactory receptors are continuously renewed.

The three types of cones are

Match the following eye disorder with its description. a.color blindness b.night blindness c.glaucoma d.hyperopia e.diplopia f.presbyopia g.myopia h.cataract i.astigmatism -Lack of a cone type

Which of the following activities occurs in the presence of light within the phototransduction pathway?

Each sensory neuron responds to stimulus information within its ____________________, which is a circumscribed region of the skin surface surrounding it.