Question 1

Which of the following constitute the vestibular apparatus?

Accepted Answer

A)  saccule and utricle only
B)  semicircular canals,saccule,and utricle
C)  ampullae of Lorenzini
D)  saccule,utricle,and Organ of Corti
E)  saccule,utricle,and ventricleF) All of the above
G) A) and E)

Question 2

Pain receptors are activated by tissue damage,but pain perception requires intact,functional neurons.How does this work?

Accepted Answer

A)  Nociceptor neurons have special membrane repair mechanisms.
B)  The nociceptor neuron only sends action potentials as it is dying.
C)  The axon continues to fire action potentials despite damage to the cell body.
D)  The neuron itself does not need to be damaged; it responds to signals released by nearby damaged cells.E) A) and B)
F) C) and D)

Question 3

A single type of receptor is responsible for detecting all tactile pressure in humans.

Accepted Answer

A) True 
 B)False

Question 4

The lateral line system provides ________ with a sense of "distant touch," enabling these animals to sense objects that reflect pressure waves and low-frequency vibrations.

Accepted Answer

A)  adult amphibians
B)  reptiles
C)  birds
D)  mammals
E)  fishF) A) and B)
G) B) and D)

Question 5

Which taste modality does not involve activation of a G-protein coupled receptor?

Accepted Answer

A)  bitter
B)  sweet
C)  umami
D)  sour
E)  all taste sensations involve GPCRsF) A) and B)
G) None of the above

Question 6

Nociceptors can respond to nearby tissue damage by sensing cytosolic factors released by damaged cells.Such "algogenic agents" can cause pain sensation even in the absence of tissue damage.What might be a practical use for such an agent?

Accepted Answer

A)  a nonlethal riot control measure
B)  an anesthetic drug
C)  a treatment for damaged tissue
D)  a tasty food additiveE) A) and B)
F) C) and D)

Question 7

Which of the following do humans NOT have taste buds specialized to sense?

Accepted Answer

A)  salty
B)  sour
C)  sweet
D)  vitamins
E)  bitterF) A) and B)
G) A) and C)

Question 8

What effect do high frequency sounds tend to have on the ear?

Accepted Answer

A)  displace the whole length of the basilar membrane with a maximum near the apex
B)  move only the basal portion of the basilar membrane
C)  move only the apex portion of the basilar membrane
D)  move only the portion of the basilar membrane between the basal portion and the apex
E)  only move the tectorial membraneF) D) and E)
G) A) and D)

Question 9

Which of the following statements about hair cells is NOT true?

Accepted Answer

A)  They are found in the mammalian ear.
B)  They are found in the fish lateral line system.
C)  They can be repaired if they rupture.
D)  Bending of the cells triggers ion flow across the cell membrane.
E)  Their structure includes stereocilia and a kinocilium.F) A) and B)
G) C) and E)

Question 10

Which of the following structures is found in a human eye,but NOT in an octopus eye?

Accepted Answer

A)  retina
B)  lens
C)  optic nerve
D)  blind spot
E)  conesF) A) and E)
G) B) and C)

Question 11

Which of the following stimuli do vertebrates NOT have a specialized receptor for?

Accepted Answer

A)  hearing
B)  taste
C)  smell
D)  humidity
E)  visionF) B) and D)
G) B) and E)

Question 12

Which is NOT an example of a stimulus sensed by an interoceptor?

Accepted Answer

A)  temperature
B)  vibration
C)  pain
D)  magnetism
E)  touchF) A) and D)
G) C) and D)

Question 13

What is the molecular basis of touch sensation?

Accepted Answer

A)  Pressure on the skin squeezes out chemical signals from epidermal glands.
B)  Cell membrane distortion opens touch receptors,creating a receptor potential.
C)  Pressure damages the delicate strands of skin cell DNA,activating a complex signalling cascade.
D)  Pressure on sensory axons bursts vesicles and causes neurotransmitter release.E) A) and D)
F) C) and D) B

Question 14

There is only a single type of pain receptor.

Accepted Answer

A) True 
 B)False  False

Question 15

What sensory receptors sense stimuli that arise from within the body?

Accepted Answer

A)  gustatory receptors
B)  photoreceptors
C)  interoreceptors
D)  ampullae of Lorenzini
E)  exteroreceptorsF) B) and E)
G) All of the above

Question 16

Which of the following is NOT an example of a mechanoreceptor?

Accepted Answer

A)  Meissner's corpuscles
B)  Ruffini endings
C)  Merkel cells
D)  red corpuscles
E)  Pacinian corpusclesF) C) and E)
G) B) and D)

Question 17

What difference in axonal signaling determines whether we experience a mild or a strong sensation?

Accepted Answer

A)  amplitude of action potentials
B)  frequency of action potentials
C)  action potential threshold
D)  conduction speed
E)  amount of neurotransmitter released per vesicleF) A) and E)
G) A) and D)

Question 18

Rank the sensory receptors in order,from the ability to detect the widest variety of molecules,to the least variety of molecules (or none).
1.gustatory receptors
2.photoreceptors
3.olfactory receptors
4.TRP channel temperature receptors

Accepted Answer

The answer of Rank the sensory receptors in order,from the...

Question 19

Which of the following stimuli will NOT activate a nociceptor?

Accepted Answer

A)  extremes in temperature
B)  very intense mechanical stimulation
C)  specific chemicals in the extracellular fluid
D)  chemicals released by injured cells
E)  external odorant moleculesF) C) and D)
G) A) and E) E

Question 20

Which of the following cells are NOT found in the retina?

Accepted Answer

A)  rods
B)  cones
C)  bipolar cells
D)  hair cells
E)  ganglion cellsF) B) and D)
G) B) and E)

Exam 43: Sensory Systems

Which of the following constitute the vestibular apparatus?

Correct AnswerverifiedShow Answer

Pain receptors are activated by tissue damage,but pain perception requires intact,functional neurons.How does this work?

Correct AnswerverifiedShow Answer

A single type of receptor is responsible for detecting all tactile pressure in humans.

Correct AnswerverifiedShow Answer

The lateral line system provides ________ with a sense of "distant touch," enabling these animals to sense objects that reflect pressure waves and low-frequency vibrations.

Correct AnswerverifiedShow Answer

Which taste modality does not involve activation of a G-protein coupled receptor?

Correct AnswerverifiedShow Answer

Nociceptors can respond to nearby tissue damage by sensing cytosolic factors released by damaged cells.Such "algogenic agents" can cause pain sensation even in the absence of tissue damage.What might be a practical use for such an agent?

Correct AnswerverifiedShow Answer

Which of the following do humans NOT have taste buds specialized to sense?

Correct AnswerverifiedShow Answer

What effect do high frequency sounds tend to have on the ear?

Correct AnswerverifiedShow Answer

Which of the following statements about hair cells is NOT true?

Correct AnswerverifiedShow Answer

Which of the following structures is found in a human eye,but NOT in an octopus eye?

Correct AnswerverifiedShow Answer

Which of the following stimuli do vertebrates NOT have a specialized receptor for?

Correct AnswerverifiedShow Answer

Which is NOT an example of a stimulus sensed by an interoceptor?

Correct AnswerverifiedShow Answer

What is the molecular basis of touch sensation?

Correct AnswerverifiedB

There is only a single type of pain receptor.

Correct AnswerverifiedFalse

What sensory receptors sense stimuli that arise from within the body?

Correct AnswerverifiedShow Answer

Which of the following is NOT an example of a mechanoreceptor?

Correct AnswerverifiedShow Answer

What difference in axonal signaling determines whether we experience a mild or a strong sensation?

Correct AnswerverifiedShow Answer

Rank the sensory receptors in order,from the ability to detect the widest variety of molecules,to the least variety of molecules (or none). 1.gustatory receptors 2.photoreceptors 3.olfactory receptors 4.TRP channel temperature receptors

Correct AnswerverifiedShow Answer

Which of the following stimuli will NOT activate a nociceptor?

Correct AnswerverifiedE

Which of the following cells are NOT found in the retina?

Correct AnswerverifiedShow Answer

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B

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False

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E

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