Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Human Phys LFS112 > Week 12 Sensory > Flashcards

Week 12 Sensory Flashcards

1
Q

Which of the following descriptions best matches the term stereocilia?

A

bending these produces receptor potential in hair cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which of the following statements about the retina is true?
Answers:
Ganglion cells send axons to the brain as cranial nerve II.

Axons carrying its output synapse in the thalamus.

It has photoreceptors that do not respond to dim light.

Cones and rods are not equally distributed across the retina.

All of the answers are correct.

A

All of the answers are correct.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which of the following components of the ear detects changes in body position that contributes to vestibular function (balance)?

A

the semicircular canals.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

There are three different types of cones, each one sensitive to different light energies. These cones are designated

A

red, green, blue.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What part of the eye controls the amount of light entering through the pupil

A

c.

iris.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

In the human eye, most refraction occurs when light passes through the

A

cornea.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The vibrations received by the tympanic membrane are transferred to the oval window by the

A

auditory ossicles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Low frequency sounds stimulate hair cells on which part of the basilar membrane?

A

the distal end

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Photoreceptor cells that are most useful in dim light are ________, while photoreceptor cells that convey our ability to see colour are ________.

A

rods, cones.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which of the following descriptions best matches the term otoliths?
move up and down when the stapes moves back and forth

transmit movement of the tympanic membrane to the inner ear

bending these produces receptor potential in hair cells

tiny weights necessary for the static sense of equilibrium

seal the oval window

A

tiny weights necessary for the static sense of equilibrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A ray of light entering the eye will encounter the following structures in which order?

A

conjunctiva → cornea → aqueous humor → lens → vitreous body → retina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The structure that forms the “roof” of the organ of Corti is the

A

tectorial membrane.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A reduction in sensitivity in the presence of a constant stimulus is referred to as

A

adaptation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What structure changes the shape of the lens for far and near vision?

A

ciliary body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following is true of the vascular tunic of the eye?
Answers:
provides a route for blood vessels that supply tissues of the eye

regulates the amount of light entering the eye

secretes and reabsorbs the aqueous humor

controls the shape of the lens

All of the answers are correct.

A

All of the answers are correct.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The lens of the eye focuses light on the retina by;

A

changes in its convexity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The human lens focuses light on the photoreceptor cells by

A

changing shape.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The sensory receptors of the semicircular canals are located in the

A

ampullae.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The opening in the iris through which light passes is the

A

pupil.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Which of the following is true of olfactory discrimination?
Answers:
There are 6 primary smells known.

The number of olfactory receptors decline as we age.

All odorants require the same concentration to activate an olfactory receptor.

There are different types of olfactory receptor cells to detect each type of odorant.

All of the answers are correct.

A

The number of olfactory receptors decline as we age.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Standing still in an elevator that suddenly lowers will stimulate receptors in the

A

utricle and saccule.

22
Q

When all three cone populations are stimulated equally, we perceive

A

white.

23
Q

Mechanoreceptors might detect which of the following sensations?
Answers:
pressure

touch

vibration

muscle length

All of the answers are correct.

A

All of the answers are correct.

24
Q

Which of the following is NOT one of the primary taste sensations?
Answers:
a.
umami.

b.
brackish.

c.
bitter.

d.
sweet.

A

brackish.

25
Q

When an external force bends the stereocilia of the inner ear hair cells,

A

there is a change in the transmembrane potential of the hair cells.

26
Q

Peripheral adaptation ________ the number of action potentials that reach the CNS.

A

decreases

27
Q

The ________ ear collects sounds waves and transmits them to the ________ ear, which contains auditory

A

outer; middle

28
Q

Before an olfactory receptor can detect an odorant, it has to

A

bind to receptors in olfactory cilia.

29
Q

The general senses
Answers:

involve receptors that are relatively simple in structure.

are located in specialized structures called sense organs.

are localized to specific areas of the body.

cannot generate action potentials.

include taste and smell.

A

involve receptors that are relatively simple in structure.

30
Q

The cochlear receptors located in the organ of Corti that provide our sense of hearing are

A

hair cells.

31
Q

Examples of sensory stimuli include
Answers:
touch.

warmth.

pain.

vibration.

All of the answers are correct.

A

All of the answers are correct.

32
Q

When you spin quickly, you may feel dizzy. Which component of the inner ear generates the sensations that can lead to this feeling?

A

semicircular canal

33
Q

________ sensations inform us of the position of the head in space by monitoring gravity, linear

A

Vestibular

34
Q

Perception of gravity and linear acceleration depends on
changes in the pressure exerted by the cupula on hair cells.

vibrations of the tectorial membrane striking hair cells.

the force exerted by otoliths on hair cells of the maculae.

the movement of endolymph within the semicircular canals.

the bending of hair cells in the ampullae.

A

the force exerted by otoliths on hair cells of the maculae.

35
Q

When light encounters a medium of different density, it is

A

refracted.

36
Q

Sensory neurons that adapt quickly are called ________ receptors.

A

phasic

37
Q

Which of the following descriptions best matches the term basilar membrane?

A

moves up and down due to currents in the perilymph

38
Q

Some neural tissues retain stem cells and thus the capacity to divide and replace lost neurons. Which of these special senses can replace its damaged neural receptors?

A

olfaction

39
Q

The function of the auditory tube is to

A

equalize air pressure on both sides of the tympanic membrane.

40
Q

The frequency of a perceived sound depends on
Answers:
the frequency of stereocilia vibration.

the number of hair cells that are stimulated.

which part of the cochlear duct is stimulated.

the movement of perilymph in the cochlear duct.

the frequency of vibration of the tectorial membrane.

A

which part of the cochlear duct is stimulated.

41
Q

The optic disc is a blind spot because

A

there are no photoreceptors in that area.

42
Q

Sensory neurons that are always active are called ________ receptors.

A

tonic

43
Q

The ________ convey(s) information about head position with respect to gravity.
Answers:
cochlea

utricle

ampulla

saccule

utricle and the saccule

A

utricle and the saccule

44
Q

Which of the following is not one of the six primary taste sensations?
Answers:
sweet

peppery

sour

salty

umami

A

peppery

45
Q

The region of the ampulla that contains the receptors for rotational (dynamic) equilibrium are called

A

cristae.

46
Q

Movement of the endolymph in the semicircular canals

A

signals rotational movements.

47
Q

A loud noise causes
Answers:
a large movement of the tympanic membrane.

an alerting reaction leading to sympathetic activation.

reflex contractions of middle ear muscles.

a big pressure pulse entering the cochlear duct at that oval window.

All of the answers are correct.

A

All of the answers are correct.

48
Q

Pain is to ________ as cold is to ________.

A

nociceptors; thermoreceptors

49
Q

Perception of gravity and linear acceleration depends on

A

the force exerted by otoliths on hair cells of the maculae.

50
Q

In the human eye, most refraction occurs when light passes through the

A

cornea.

51
Q

Movement of the endolymph in the semicircular canals

A

signals rotational movements.

Human Phys LFS112 (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions