Deck 9: The Sensory System

Question 1

The function of muscle spindles is to detect

A)muscle or tendon stretch.
B)muscle or tendon contraction.
C)muscle or tendon relaxation.
D)None apply.

Answer 1

A

Question 2

Which of the following are examples of chemoreceptors?

A)Taste
B)Olfaction
C)Proprioception
D)Taste and olfaction

Answer 2

D

Question 3

Nerve signals from the general body senses travel up the spinal cord to the thalamus and then to the

A)somatosensory area of the parietal lobe.
B)prefrontal area of the frontal lobe.
C)visual area of the occipital lobe.
D)primary motor area of the frontal lobe.

Answer 3

A

Question 4

Which of the following cutaneous receptors is NOT correctly matched with its stimulus?

A)Krause end bulbs - pressure
B)Free nerve endings - heat or cold
C)Pacinian corpuscles - fine touch
D)Ruffini endings - pressure

Question 5

Which of the following is NOT a cutaneous receptor sensitive to pressure?

A)Ruffini endings
B)Meissner corpuscles
C)Pacinian corpuscles
D)Krause end bulb

Question 6

What type of receptor responds to changes in temperature?

A)Mechanoreceptor
B)Thermoreceptor
C)Photoreceptor
D)Chemoreceptor

Question 7

Receptors all over the body are very specific in the type of stimulus they respond to.
Receptors all over the body are somewhat,but not completely specialized.

Question 8

Information from muscle spindles and Golgi tendon organs are used for

A)maintaining equilibrium and posture.
B)processing pain.
C)registering pressure.
D)registering light touch.

Question 9

The response to signals from muscle spindles is to

A)decrease the degree of muscle contraction.
B)increase the degree of muscle relaxation.
C)increase the degree of muscle contraction.
D)decrease the frequency of impulses to muscles.

Question 10

The signaling system begun by a stimulus is called a(n)

A)action potential.
B)all-or-none response.
C)receptor potential.
D)local potential.

Question 11

Excessive muscle contraction will activate

A)muscle spindles.
B)Golgi tendon organs.
C)Merkel disks.
D)Meissner corpuscles.

Question 12

Proprioceptors are involved in the sense of

A)pain.
B)temperature.
C)pressure.
D)limb position.

Question 13

Which type of cutaneous receptor would respond to the lightest pressure?

A)Krause end bulbs
B)Ruffini endings
C)Pacinian corpuscles
D)Meissner corpuscles

Question 14

Which of the following is NOT a cutaneous receptor sensitive to fine touch?

A)Meissner corpuscles
B)Root hair plexus
C)Pacinian corpuscles
D)Merkel disks

Question 15

What type of cutaneous receptor would be the first to respond to a touch that barely contacts the skin of the forearm?

A)Merkel disk
B)Pacinian corpusle
C)Meissner corpuscle
D)Root hair plexus

Question 16

The speed of the action potentials generated by a muscle spindle is proportional to the amount of muscle stretch.

Question 17

The response to signals from Golgi tendon organs is to

A)decrease the degree of muscle contraction.
B)decrease the degree of muscle relaxation.
C)increase the degree of muscle contraction.
D)None apply.

Question 18

The feeling of pain on the body surface that has its origin in an internal organ is called

A)nociception.
B)proprioception.
C)referred pain.
D)visceral pain.

Question 19

Temperature receptors of the skin are

A)Ruffini endings.
B)Krause end bulbs.
C)Free nerve endings.
D)Merkel disks.

Question 20

Receptors can generate action potentials.
Receptors can not generate action potentials.

Question 21

The mucous membrane that lines the inside of the eyelids is called the

A)conjunctivA.
B)lacrimal apparatus.
C)aqueous humor.
D)sclera.

Question 22

The sensory receptors for taste are located in

A)taste buds.
B)salivary glands.
C)the teeth.
D)the cheeks.

Question 23

An emotional response to an odor means that the _______ is involved.

A)reticular activating system
B)limbic system
C)somatosensory area
D)cerebrospinal fluid

Question 24

What is the purpose of blinking of the eyes?

A)Lubricate the eye surface
B)Protect the eye from infection
C)Remove debris from the eye surface
D)Lubricate and remove debris from eye surface

Question 25

Nociceptors

A)are stimulated by chemicals released from damaged tissues.
B)detect pain.
C)are found in internal organs.
D)All apply.

Question 26

The olfactory receptors are located

A)in the roof of the nasal cavity.
B)on nasal mucosa cilia.
C)in the back of the throat.
D)in the paranasal sinuses.

Question 27

Which of the following is NOT a stimulus that will activate a chemoreceptor?

A)Taste of pizza
B)Carbon dioxide level of the blood
C)Oxygen deprivation in a visceral organ
D)Smell of roses

Question 28

Somatic nociceptors are stimulated by excessive stretching of internal organs.
Visceral nociceptors are stimulated by excessive stretching of internal organs.

Question 29

The bonding of chemicals to receptors on microvilli of the taste buds will initiate nerve impulses.

Question 30

When a person suffers a heart attack they often experience pain in their left shoulder and arm.What is this called and why does it occur?

Question 31

Which of the following bones is NOT part of the orbit of the eye?

A)Ethmoid
B)Palatine
C)Zygomatic
D)Temporal

Question 32

Taste buds are found on structures called lamellae.
Taste buds are found on structures called papillae.

Question 33

Which of the following is INCORRECT about olfaction (smell)?

A)Olfactory cells are modified neurons.
B)Olfactory cilia have receptors for odor molecules.
C)There are 23 primary odors.
D)What we taste is related to what we smell.

Question 34

The gustatory (taste)area of the cerebrum is located in the

A)parietal lobe.
B)insula.
C)frontal lobe.
D)parietal lobe and insula.

Question 35

Olfactory receptors are located on microvilli projecting from olfactory cells.
Olfactory receptors are located on cilia projecting from olfactory cells.

Question 36

Pain receptors are stimulated by normal changes in chemicals.
Pain receptors are stimulated by abnormal changes in chemicals.

Question 37

The structure that produces tears is called the

A)conjunctivA.
B)lacrimal apparatus.
C)aqueous humor.
D)sclera.

Question 38

Which of the following is NOT a primary taste?

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

Question 39

Gustation and olfaction rely on each other to give complete perceptions of taste and smell.

Question 40

The olfactory area of the cerebrum is located in the

A)insulA.
B)parietal lobe.
C)temporal lobe.
D)frontal lobe.

Question 41

Changing the shape of the lens for near and far vision is called

A)refraction.
B)accommodation.
C)convergence.
D)transmutation.

Question 42

The anterior compartment of the eye is filled with a fluid called the

A)aqueous humor.
B)lacrimal secretions.
C)vitreous humor.
D)fovea centralis.

Question 43

The medial rectus muscle

A)rolls the eye upward.
B)turns the eye outward,away from the midline.
C)turns the eye inward,toward the midline.
D)rotates the eye clockwise.

Question 44

Which of the following is NOT a cranial nerve that innervates the extrinsic eye muscles?

A)Oculomotor
B)Abducens
C)Trigeminal
D)Trochlear

Question 45

The superior oblique muscle

A)rolls the eye upward.
B)turns the eye outward,away from the midline.
C)rotates the eye counterclockwise.
D)rotates the eye clockwise.

Question 46

Protection and support is the function of the ____ of the eye.

A)retina
B)cornea
C)choroid
D)sclera

Question 47

Photoreceptors are located in the

A)retinA.
B)cornea.
C)choroids.
D)sclera.

Question 48

Which eye muscle is innervated by the abducens nerve?

A)Lateral rectus muscle
B)Medial rectus muscle
C)Superior oblique muscle
D)Inferior rectus muscle

Question 49

The inferior rectus muscle

A)rolls the eye downward.
B)rotates the eye clockwise.
C)turns the eye inward,toward the midline.
D)rolls the eye upwarD.

Question 50

What is the area that contains only cones for the most acute vision?

A)Vitreous body
B)Bipolar cell layer
C)Fovea centralis
D)Blind spot

Question 51

The conjunctiva covers the cornea.
The conjunctiva covers the anterior eye,but not the cornea.

Question 52

The muscle that controls the amount of light that enters the eye through the pupil is the

A)choroids.
B)suspensory ligament.
C)ciliary muscle.
D)iris.

Question 53

What is the function of the iris?

A)Changes the shape of the lens
B)Absorbs stray light rays
C)Regulates the size of the pupil
D)Refracts light rays

Question 54

The lens of the eye rounds up or bulges

A)for distant vision.
B)for close vision.
C)when a person is frightened.
D)when sleeping.

Question 55

The lens is held in place by the

A)retinA.
B)cornea.
C)choroids.
D)ciliary body.

Question 56

Absorption of stray light rays occurs in the

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

Question 57

The posterior compartment of the eye is filled with a clear gel called the

A)aqueous humor.
B)lacrimal secretions.
C)vitreous humor.
D)fovea centralis.

Question 58

Eyebrows have no function connected with the eyes.They are only cosmetic.
Eyes shade the eyes from light and block perspiration.

Question 59

The three pair of muscles attached to the outside of the eyeball that are used for eye movement are called ____ muscles.

A)intrinsic
B)extrinsic

Question 60

The levator palpebrae superioris muscle will raise the eyebrows.
The levator palpebrae superioris muscle will raise the eyelid.

Question 61

The cones are most densely packed in the

A)blind spot.
B)vitreous humor.
C)fovea centralis.
D)choroids.

Question 62

The photopigment rhodopsin is found in

A)rods.
B)cones.

Question 63

Both rods and cones are found with the same density in the entire retina.
Rods and cones are not evenly distributed in the retina.

Question 64

Nearsightedness is due to a(n)

A)shortened eyeball.
B)elongated eyeball.
C)damaged lens.
D)damaged cornea.

Question 65

Which is (are)involved in refraction?

A)lens
B)iris
C)choriod
D)All apply.

Question 66

People who can see close objects better than those far away have

A)hyperopiA.
B)myopia.
C)presbyopia.
D)astigmatism.

Question 67

The place where the optic nerve exits the eye is the

A)lens.
B)blind spot.
C)ciliary body.
D)fovea.

Question 68

Describe the focusing process of the eye.

Question 69

Photoreceptors are the same as other types of receptors in that the stimulus of light causes the release of neurotransmitters,which then creates an action potential.
Photoreceptors are different from other types of receptors in that the stimulus of light stops the release of neurotransmitters,which then creates an action potential.

Question 70

Where does the visual pathway cross so that each optic tract carries impulses from the opposite visual field?

A)Thalamus
B)Optic radiations
C)Optic chiasma
D)Optic nerve

Question 71

The image,╓ is projected onto the retina as ╜.

Question 72

The clouding of the lens is called

A)a cataract.
B)macular degeneration.
C)detached retina.
D)glaucoma.

Question 73

Changing the shape of the lens to correctly focus light on the retina is called

A)refraction.
B)accommodation.
C)astigmatism.
D)presbyopia.

Question 74

The buildup of pressure due to an increased amount of aqueous humor is known as

A)cataracts.
B)glaucoma.
C)a sty.
D)astigmatism.

Question 75

Explain why someone with a vitamin A deficiency might have dim vision at night.

Question 76

Which of the following is NOT involved in refraction?

A)Cornea
B)Aqueous humor
C)Lens
D)Pupil

Question 77

Which of the following is the correct pathway from the retina to the visual cortex?

A)Optic nerve,optic radiations,optic chiasma,ganglion cells,thalamus,optic tract,occipital lobe
B)Optic tract,ganglion cells,optic radiations,thalamus,optic chiasma,optic nerve,temporal lobe
C)Ganglion cells,optic nerve,optic chiasma,optic tract,thalamus,optic radiations,occipital lobe
D)Optic nerve,optic tract,optic chiasma,optic radiations,thalamus,ganglion cells,parietal lobe

Question 78

Blindness caused by abnormal blood vessel growth in the retina is

A)cataracts.
B)macular degeneration.
C)glaucoma.
D)conjunctivitis.

Question 79

Which of the following is (are)true of the rods?

A)See color
B)Function in dim light
C)Located in the fovea centralis
D)All apply.

Question 80

Which of the following is NOT a color pigment found in cones?

A)Red
B)Green
C)Yellow
D)Blue