Question 1

Which cutaneous receptors are sensitive to pressure?

Accepted Answer

A) Pacinian corpuscles and Ruffini endings 
B) Pacinian corpuscles and Meissner corpuscles 
C) Ruffini endings and Merkel disks 
D) Root hair plexus and Krause end bulbs 
E) Krause end bulbs and Merkel disks 
A) Pacinian corpuscles and Ruffini endings 
B) Pacinian corpuscles and Meissner corpuscles 
C) Ruffini endings and Merkel disks 
D) Root hair plexus and Krause end bulbs 
E) Krause end bulbs and Merkel disks A

Question 2

As people age,they often have trouble seeing near objects.This farsightedness is treated by

Accepted Answer

A) radial keratotomy. 
B) an unevenly ground lens to compensate for an uneven cornea. 
C) cataract surgery. 
D) wearing concave lenses to refocus the image on the retina. 
E) wearing convex lenses to refocus the image on the retina. 
A) radial keratotomy. 
B) an unevenly ground lens to compensate for an uneven cornea. 
C) cataract surgery. 
D) wearing concave lenses to refocus the image on the retina. 
E) wearing convex lenses to refocus the image on the retina. E

Question 3

Which of the following lists of ear structures are all membranous structures?

Accepted Answer

A) ossicles,tympanic membrane,oval window,otoliths 
B) cochlea,ampulla 
C) tympanic membrane,oval window,round window 
D) malleus,incus,stapes 
E) tympanic membrane,oval window,stapes 
A) ossicles,tympanic membrane,oval window,otoliths 
B) cochlea,ampulla 
C) tympanic membrane,oval window,round window 
D) malleus,incus,stapes 
E) tympanic membrane,oval window,stapes C

Question 4

The sense of smell is unique because it

Accepted Answer

A) may be associated with vivid memories. 
B) has direct connections to the limbic system and associated emotions. 
C) works in conjunction with the sense of taste to produce a combined smell-taste effect. 
D) All of the choices are correct. 
A) may be associated with vivid memories. 
B) has direct connections to the limbic system and associated emotions. 
C) works in conjunction with the sense of taste to produce a combined smell-taste effect. 
D) All of the choices are correct.

Question 5

If light rays are not focused evenly on the retina,a fuzzy image is formed.This condition is called

Accepted Answer

A) nearsightedness. 
B) farsightedness. 
C) astigmatism. 
D) cataracts. 
E) conduction deafness. 
A) nearsightedness. 
B) farsightedness. 
C) astigmatism. 
D) cataracts. 
E) conduction deafness.

Question 6

The ciliary muscle

Accepted Answer

A) is extremely sensitive to light and responsible for night vision. 
B) is the part of the eye that contains rods,cones,and bipolar cells. 
C) controls the shape of the lens to maintain a clear image of focus at various distances. 
D) is the part of the inner ear that recognizes rotational equilibrium. 
E) is the internal part of the cochlea with hair cells that are stimulated by sound waves. 
A) is extremely sensitive to light and responsible for night vision. 
B) is the part of the eye that contains rods,cones,and bipolar cells. 
C) controls the shape of the lens to maintain a clear image of focus at various distances. 
D) is the part of the inner ear that recognizes rotational equilibrium. 
E) is the internal part of the cochlea with hair cells that are stimulated by sound waves.

Question 7

Which of the following eye conditions is NOT treated with corrective lenses?

Accepted Answer

A) farsightedness 
B) cataracts 
C) nearsightedness 
D) astigmatism 
E) nearsightedness and astigmatism are not treated with corrective lens. 
A) farsightedness 
B) cataracts 
C) nearsightedness 
D) astigmatism 
E) nearsightedness and astigmatism are not treated with corrective lens.

Question 8

Why do snakes flick their tongue when they see potential prey?

Accepted Answer

A) They are trying to bring scent molecules into the mouth so the Jacobson's organs can decipher them. 
B) They are trying to detect the various scent molecules with their tongue. 
C) Snakes use tongue flicking as a means of communication. 
D) All of the choices are correct. 
A) They are trying to bring scent molecules into the mouth so the Jacobson's organs can decipher them. 
B) They are trying to detect the various scent molecules with their tongue. 
C) Snakes use tongue flicking as a means of communication. 
D) All of the choices are correct.

Question 9

When you look at an image,it is inverted on the back of the retina and yet appears right-side-up when perceived in the brain.This change has occurred in

Accepted Answer

A) the retina which integrates the visual image. 
B) the ganglionic cells. 
C) the rods and cones themselves. 
D) the visual regions of the brain. 
E) the lens. 
A) the retina which integrates the visual image. 
B) the ganglionic cells. 
C) the rods and cones themselves. 
D) the visual regions of the brain. 
E) the lens.

Question 10

The crayfish has a cavity or "statocysts" lined with sensory setae or hairs.A grain in the cavity is pulled downward by gravity; the pressure against the bottom hairs of the cavity gives the crayfish a perception of being upright and,when it changes orientation,the grain touches side hairs that make it realize it is not upright.Thus the crayfish "knows" which way is up in the dark.This sense is most closely related in function to the human sense of

Accepted Answer

A) hot and cold. 
B) hearing. 
C) smell. 
D) sight. 
E) balance. 
A) hot and cold. 
B) hearing. 
C) smell. 
D) sight. 
E) balance.

Question 11

If a fish suffers from a fungal skin infection that causes the cupula to become blocked,what will occur?

Accepted Answer

A) Water will not be able to enter the cupula which would prevent the cilia from bending.If the cilia do not bend in response to the water it will not initiate a nerve impulse and the fish will lose the ability to detect nearby objects. 
B) Water will not be able to enter the cupula which would prevent the cilia from bending.If the cilia do not bend in response to the water it will over stimulate the nerve impulses and the fish will lose the ability to detect nearby objects. 
C) Water will not be able to enter the cupula which would prevent the cilia from bending.The fungal infection would then be allowed to enter into the bloodstream through the cupula. 
D) Water will not be able to enter the cupula which would prevent the cilia from maintaining its normal upright position.If the cilia do not stay upright it will not be able to initiate a nerve impulse and they will lose the ability to detect nearby objects. 
A) Water will not be able to enter the cupula which would prevent the cilia from bending.If the cilia do not bend in response to the water it will not initiate a nerve impulse and the fish will lose the ability to detect nearby objects. 
B) Water will not be able to enter the cupula which would prevent the cilia from bending.If the cilia do not bend in response to the water it will over stimulate the nerve impulses and the fish will lose the ability to detect nearby objects. 
C) Water will not be able to enter the cupula which would prevent the cilia from bending.The fungal infection would then be allowed to enter into the bloodstream through the cupula. 
D) Water will not be able to enter the cupula which would prevent the cilia from maintaining its normal upright position.If the cilia do not stay upright it will not be able to initiate a nerve impulse and they will lose the ability to detect nearby objects.

Question 12

Arthropods

Accepted Answer

A) have camera-type eyes. 
B) have eyespots that sense the direction and intensity of light. 
C) make use of a wider range of the electromagnetic spectrum than humans. 
D) have compound eyes composed of independent units called ommatidia. 
E) All of the above are true. 
A) have camera-type eyes. 
B) have eyespots that sense the direction and intensity of light. 
C) make use of a wider range of the electromagnetic spectrum than humans. 
D) have compound eyes composed of independent units called ommatidia. 
E) All of the above are true.

Question 13

What are the semicircular canals?

Accepted Answer

A) the point of the eye at which color vision is most acute 
B) the part of the eye that contains rods,cones,and bipolar cells 
C) the part of the inner ear that recognizes rotational equilibrium and movement 
D) the part of the choroid coat of the eye that is attached to the lens and the iris 
E) the internal part of the cochlea with hair cells that are stimulated by sound waves 
A) the point of the eye at which color vision is most acute 
B) the part of the eye that contains rods,cones,and bipolar cells 
C) the part of the inner ear that recognizes rotational equilibrium and movement 
D) the part of the choroid coat of the eye that is attached to the lens and the iris 
E) the internal part of the cochlea with hair cells that are stimulated by sound waves

Question 14

Which statement about smell receptors is NOT true?

Accepted Answer

A) They are chemoreceptors. 
B) They are located in the roof of the nasal cavity in humans. 
C) They send information to the brain by way of the olfactory bulb. 
D) They are capable of responding to pressure as well as chemical changes. 
E) They can detect some molecules better than others. 
A) They are chemoreceptors. 
B) They are located in the roof of the nasal cavity in humans. 
C) They send information to the brain by way of the olfactory bulb. 
D) They are capable of responding to pressure as well as chemical changes. 
E) They can detect some molecules better than others.

Question 15

Benign positional vertigo is due to

Accepted Answer

A) the formation of particles in the semicircular canal.These particles will stimulate the steroeocilia producing a sensation of movement when there is actually no movement. 
B) the formation of particles in the semicircular canal resulting in an inner ear infection. 
C) the formation of particles in the cochlea.These particles will stimulate the steroeocilia producing a sensation of movement when there is actually no movement. 
D) the formation of particles in the malleus.These particles will stimulate the steroeocilia producing a sensation of movement when there is actually no movement. 
E) the calcification of the malleus producing a decrease in the conduction of sound. 
A) the formation of particles in the semicircular canal.These particles will stimulate the steroeocilia producing a sensation of movement when there is actually no movement. 
B) the formation of particles in the semicircular canal resulting in an inner ear infection. 
C) the formation of particles in the cochlea.These particles will stimulate the steroeocilia producing a sensation of movement when there is actually no movement. 
D) the formation of particles in the malleus.These particles will stimulate the steroeocilia producing a sensation of movement when there is actually no movement. 
E) the calcification of the malleus producing a decrease in the conduction of sound.

Question 16

There are more rods than cones but many rods may synapse with one ganglion cell while only one cone synapses with one ganglion.Therefore,when light intensity drops at night,we can expect a lit city street scene to be

Accepted Answer

A) intense in color and very sharp. 
B) more black-and-white but very sharp. 
C) intense in color but grainy. 
D) more black-and-white and grainy. 
E) identical to the image formed of the street in daytime. 
A) intense in color and very sharp. 
B) more black-and-white but very sharp. 
C) intense in color but grainy. 
D) more black-and-white and grainy. 
E) identical to the image formed of the street in daytime.

Question 17

The sclera is continuous with the

Accepted Answer

A) cornea. 
B) iris. 
C) retina. 
D) choroid coat. 
E) fovea centralis. 
A) cornea. 
B) iris. 
C) retina. 
D) choroid coat. 
E) fovea centralis.

Question 18

In the abnormal eyeball pictured here,the size of a normal eye is noted with a dotted line.This type of abnormality results in

Accepted Answer

A) farsightedness. 
B) astigmatism. 
C) nearsightedness. 
D) cataracts. 
E) glaucoma. 
A) farsightedness. 
B) astigmatism. 
C) nearsightedness. 
D) cataracts. 
E) glaucoma.

Question 19

All of the following statements about sensory receptors are true EXCEPT

Accepted Answer

A) sensory receptors monitor the internal environment of the body. 
B) chemoreception is believed to be a primitive sense in animals. 
C) sensory receptors for taste are found in the nose and mouth. 
D) the retina of the eye contains photoreceptors that are sensitive to light. 
E) photoreceptors include rod and cone cells. 
A) sensory receptors monitor the internal environment of the body. 
B) chemoreception is believed to be a primitive sense in animals. 
C) sensory receptors for taste are found in the nose and mouth. 
D) the retina of the eye contains photoreceptors that are sensitive to light. 
E) photoreceptors include rod and cone cells.

Question 20

The molecules rhodopsin and retinal are involved in the sensory system that detects

Accepted Answer

A) hot and cold. 
B) hearing. 
C) smell. 
D) sight. 
E) balance. 
A) hot and cold. 
B) hearing. 
C) smell. 
D) sight. 
E) balance.

Exam 38: Sense Organs

Which cutaneous receptors are sensitive to pressure?

As people age,they often have trouble seeing near objects.This farsightedness is treated by

Which of the following lists of ear structures are all membranous structures?

The sense of smell is unique because it

If light rays are not focused evenly on the retina,a fuzzy image is formed.This condition is called

The ciliary muscle

Which of the following eye conditions is NOT treated with corrective lenses?

Why do snakes flick their tongue when they see potential prey?

When you look at an image,it is inverted on the back of the retina and yet appears right-side-up when perceived in the brain.This change has occurred in

If a fish suffers from a fungal skin infection that causes the cupula to become blocked,what will occur?

Arthropods

What are the semicircular canals?

Which statement about smell receptors is NOT true?

Benign positional vertigo is due to

There are more rods than cones but many rods may synapse with one ganglion cell while only one cone synapses with one ganglion.Therefore,when light intensity drops at night,we can expect a lit city street scene to be

The sclera is continuous with the

In the abnormal eyeball pictured here,the size of a normal eye is noted with a dotted line.This type of abnormality results in

All of the following statements about sensory receptors are true EXCEPT

The molecules rhodopsin and retinal are involved in the sensory system that detects

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