Deck 10: Sense Organs

Question 1

During a physical examination the veterinarian curls a dog's foot under so it is upside down. The dog immediately brings the foot back to the normal standing position. What sense did the dog use to do this?

A) nociception
B) proprioception
C) tactile sensation
D) visceral sensation

Answer 1

proprioception

Question 2

Sense organs contain modified nerve endings called __ that act as sensory receptors.

A) axons
B) dendrites
C) neurotransmitters
D) perikaryons

Answer 2

dendrites

Question 3

The conversion of a painful stimulus to a nerve impulse occurs in the

A) brain.
B) dorsal horn of the spinal cord.
C) sensory nerve ending.
D) ventral horn of the spinal cord.

Answer 3

sensory nerve ending.

Question 4

Which of the four processes that contribute to pain can be influenced through treatment with drugs?

A) modulation
B) perception
C) transduction
D) transmission

Question 5

Wind-up, if it occurs, is seen in animals

A) after an analgesic is administered.
B) after recovery from general anesthesia.
C) during administration of general anesthesia.
D) during an extended surgical procedure.

Question 6

The gustatory sense is dependent on __ stimulation.

A) chemical
B) electromagnetic
C) mechanical
D) thermal

Question 7

The pain-experiencing sense is also known as the __ sense.

A) gustatory
B) nociception
C) proprioception
D) tactile

Question 8

Olfactory sensors are found in the

A) cerebellum.
B) cerebrum.
C) nasal passages.
D) pharynx.

Question 9

The sensory organs and structures associated with the special senses are all located in the

A) brain.
B) head.
C) neck.
D) spinal cord.

Question 10

The only place in an animal's body where there are no pain receptors is (are) the

A) brain.
B) eyeballs.
C) heart.
D) lungs.

Question 11

Touch is also known as the __ sense.

A) nociception
B) proprioception
C) tactile
D) thermal

Question 12

Which one of the following senses is a special sense?

A) pain
B) smell
C) temperature
D) touch

Question 13

The core temperature of a cow is taken

A) in the axillary region.
B) in the inguinal region.
C) in the mouth.
D) in the rectum.

Question 14

The hearing sensory receptors are found in the

A) eardrum.
B) external ear.
C) inner ear.
D) middle ear.

Question 15

Central temperature receptors are located in the __ of the CNS.

A) brainstem
B) hypothalamus
C) pituitary gland
D) thyroid gland

Question 16

Conscious perception of pain takes place in the

A) brainstem.
B) cerebellar cortex.
C) cerebral cortex.
D) medulla oblongata.

Question 17

Homeostasis, the balance of nutrients and fluids in the body, depends on __ sensations.

A) gustatory
B) pain
C) tactile
D) visceral

Question 18

Modulation of sensory nerve impulses occurs in the

A) brain.
B) pain receptor.
C) sensory nerve.
D) spinal cord.

Question 19

When stretched, most hollow organs elicit

A) heat.
B) pain.
C) proprioception.
D) sound.

Question 20

The normal upper end of the temperature reference range of a goat is 103.5° F. What would be the maximum body temperature compatible with life for this goat?

A) 108.5° F
B) 113.5° F
C) 118.5° F
D) 123.5° F

Question 21

The most medial of the ossicles is the

A) cochlea.
B) incus.
C) malleus.
D) stapes.

Question 22

Another name for the eardrum is the

A) basilar membrane.
B) nictitating membrane.
C) tectorial membrane.
D) tympanic membrane.

Question 23

The ossicles of the ear link the

A) eustachian tube with the pharynx.
B) organ of Corti with the vestibule.
C) tympanic membrane with the cochlea.
D) utricle with the saccule.

Question 24

The receptor organ of hearing is the

A) macula.
B) organ of Corti.
C) semicircular canal.
D) vestibule.

Question 25

Equilibrium is maintained through stimulation of sensory receptors in the

A) cochlea and otoliths.
B) semicircular canals and cochlea.
C) vestibule and cochlea.
D) vestibule and semicircular canals.

Question 26

When the hairs of the __ are bent, a nerve impulse is generated that gives the brain information about rotary motion of the head.

A) cupula
B) macula
C) saccule
D) utricle

Question 27

The utricle and saccule are filled with

A) air.
B) endolymph.
C) perilymph.
D) plasma.

Question 28

An upper respiratory tract infection will primarily affect the

A) auditory sense.
B) gustatory sense.
C) nociception sense.
D) olfactory sense.

Question 29

The part of the ear that is visible on the outside of the animal is the

A) pilule.
B) pilus.
C) Pincus.
D) pinna.

Question 30

The patch of sensory epithelium that generates nerve impulses that inform the brain about the position of the head is called the

A) ampulla.
B) cupula.
C) macula.
D) otolith.

Question 31

Animals hear different frequencies of sound as a result of

A) different areas of the organ of Corti being stimulated.
B) different areas of the vestibule being stimulated.
C) more hairs in the organ of Corti being stimulated.
D) more hairs in the vestibule being stimulated.

Question 32

What three structures make up the ear flap?

A) blood vessels, epithelial tissue, skeletal muscle
B) elastic cartilage, blood vessels, epithelial tissue
C) epithelial tissue, blood vessels, bone
D) fibrous cartilage, blood vessels, bone

Question 33

Endolymph is found in the

A) entire ear.
B) inner ear.
C) middle ear.
D) outer ear.

Question 34

The function of the ossicles is to

A) decrease amplitude of sound wave vibrations and increase their force.
B) decrease both the amplitude and force of sound wave vibrations.
C) increase amplitude of sound wave vibrations and decrease their force.
D) increase both the amplitude and force of sound wave vibrations.

Question 35

The function of the eustachian tube is to

A) equalize air pressure between the inner ear and the outside environment.
B) equalize air pressure between the middle ear and the inner ear.
C) equalize air pressure between the middle ear and the outside environment.
D) equalize air pressure between the outer ear and the pharynx.

Question 36

The eardrum is made up of

A) adipose tissue.
B) connective tissue.
C) epithelial tissue.
D) muscle tissue.

Question 37

Otoliths are found in the

A) eustachian tube.
B) middle ear.
C) semicircular canals.
D) vestibule.

Question 38

Which bone(s) of the skull house(s) most of the middle and inner ear structures?

A) frontal bone
B) maxillary bone
C) occipital bone
D) temporal bones

Question 39

An ear hematoma associated with otitis externa is most often found

A) in the external auditory canal.
B) in the middle ear.
C) on the eardrum.
D) on the underside of the pinna.

Question 40

The vestibule is primarily responsible for sensing

A) high-pitched sounds.
B) low-pitched sounds.
C) position of the head.
D) rotary motion of the head.

Question 41

The dividing structure that separates the anterior chamber from the posterior chamber is the

A) choroid.
B) iris.
C) lens.
D) limbus.

Question 42

The sensory receptors for vision are located in the

A) ciliary body.
B) cornea.
C) lens.
D) retina.

Question 43

The most common cause of glaucoma is

A) insufficient drainage of aqueous humor.
B) insufficient drainage of vitreous humor.
C) overproduction of aqueous humor.
D) overproduction of vitreous humor.

Question 44

The "diaphragm" of the eye that controls the amount of light that enters the eye is the

A) ciliary body.
B) cornea.
C) iris.
D) sclera.

Question 45

An animal has an area of inflammation located at the lateral limbus of the left eye. Where is the inflammation located?

A) left side of the left eyeball where the sclera meets the cornea
B) left side of the optic disc in the back of the left eyeball
C) right side of the fundus of the left eyeball
D) right side of the left eyeball where the ciliary muscle attaches to the lens

Question 46

Near and far vision are accommodated through the muscles of the

A) choroid.
B) ciliary body.
C) fundus.
D) iris.

Question 47

The "white" of the eye is the

A) choroid.
B) cornea.
C) sclera.
D) uvea.

Question 48

The anterior chamber of the eyeball is located

A) behind the iris in the aqueous compartment.
B) behind the iris in the vitreous compartment.
C) in front of the iris in the aqueous compartment.
D) in front of the iris in the vitreous compartment.

Question 49

The dividing structure that separates the aqueous chamber from the vitreous chamber is the

A) iris.
B) lens.
C) retina.
D) suspensory ligament.

Question 50

The opening at the center of the "diaphragm" of the eye is the

A) choroid.
B) ciliary body.
C) limbus.
D) pupil.

Question 51

An animal's eyes "glow" in the dark when a light is shined on them because of the

A) ciliary body.
B) iris.
C) retina.
D) tapetum.

Question 52

All the light that enters the eye enters through the

A) cornea.
B) iris.
C) limbus.
D) sclera.

Question 53

When a/an __ develops the lens becomes opaque.

A) cataract
B) catarrh
C) ocular myopathy
D) ocular vesicle

Question 54

The __ helps focus a clear image on the retina by changing its shape.

A) cornea
B) iris
C) lens
D) sclera

Question 55

The species that doesn't have eyes that "glow" in the dark when a light is shined on them is

A) caprine.
B) equine.
C) ovine.
D) porcine.

Question 56

Where is aqueous humor produced?

A) anterior chamber of the eyeball
B) canal of Schlemm
C) fovea centralis
D) posterior chamber of the eyeball

Question 57

The process of changing the shape of the lens to allow close-up and distant vision is called

A) accommodation.
B) adaptation.
C) adjustment.
D) alteration.

Question 58

The vitreous compartment of the eyeball is located

A) behind the lens and ciliary body.
B) behind the lens and in front of the ciliary body.
C) in front of the lens and behind the ciliary body.
D) in front of the lens and ciliary body.

Question 59

The sensory hairs that generate nerve impulses that give the brain information about the position and movement of the head are actually

A) modified axons.
B) modified dendrites.
C) modified oligodendroglia.
D) modified perikaryons.

Question 60

The colored part of the eye is the

A) cornea.
B) iris.
C) lens.
D) retina.

Question 61

Excess tears are initially drained from the surface of the eyes by the

A) canal of Schlemm.
B) lacrimal puncta.
C) lacrimal sacs.
D) nasolacrimal ducts.

Question 62

The thin, transparent membrane that lines the eyelids is the

A) basilar membrane.
B) bulbar conjunctiva.
C) nictitating membrane.
D) palpebral conjunctiva.

Question 63

The blind spot of the eye is the

A) canthus.
B) fundus.
C) limbus.
D) optic disc.

Question 64

Tears are produced by the

A) hypothalamus gland.
B) lacrimal gland.
C) meibomian gland.
D) pituitary gland.

Question 65

Which photoreceptors are the most sensitive to light?

A) cones
B) fovea centralis
C) optic discs
D) rods

Question 66

Where is the nictitating membrane located?

A) in the cochlea at the end of the cochlear duct
B) in the external auditory canal between the outer ear and the middle ear
C) laterally between the eyeball and the eyelid
D) medially between the eyeball and the eyelid

Question 67

The third eyelid is composed of

A) cartilage and conjunctiva.
B) conjunctiva and skin.
C) muscle and cartilage.
D) skin and muscle.

Question 68

Which sensation is a general sensation?

A) hearing
B) pain
C) smell
D) taste

Question 69

Where the upper and lower eyelids meet near the bridge of an animal's nose is the

A) lacrimal gland.
B) lateral canthus.
C) medial canthus.
D) tarsal gland.

Question 70

Which sense depends on mechanical stimulation?

A) hearing
B) smell
C) taste
D) vision

Question 71

Which part of the eyeball refracts light rays entering the eye the most?

A) aqueous humor
B) cornea
C) lens
D) vitreous humor

Question 72

The six extraocular muscles that attach to the sclera are

A) multiunit smooth muscles.
B) rectus muscles.
C) skeletal muscles.
D) visceral smooth muscles.