Brainscape's Knowledge GenomeTM

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


See full index

From Flashcardlet > A&P Lab Exercise 17 > Flashcards

A&P Lab Exercise 17 Flashcards

1
Q

Where does light strike the eye?

A

In the posterior area called the retina

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

What happens to light rays in order for us to see?

A

The light rays are bent and focuses in a certain way to strike light sensitive cells

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

What structures does the retina contain?

A

Photoreceptors (rods and cones)

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

What happens when a photoreceptor is stimulated?

A

The rods and cones send impulses that travel by way of the optic nerve to the brain

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

What are the six intrinsic eye muscles?

A 
Superior rectus
Inferior rectus
Lateral rectus 
Medial rectus
Superior oblique
Inferior oblique
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What cranial nerve innervates the superior rectus?

A

III (oculomotor)

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

What cranial nerve innervates the inferior rectus?

A

III (oculomotor)

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

What cranial nerve innervates the lateral rectus?

A

VI (abducens)

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

What cranial nerve innervates the medial rectus?

A

III (oculomotor)

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

What cranial nerve innervates the superior oblique?

A

IV (trochlear)

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

What cranial nerve innervates the inferior oblique?

A

III (oculomotor)

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

What is the white part of the eye?

A

Sclera

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

What does the sclera do?

A

Protects and holds the shape of the eye

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

What does the cornea look like?

A

The transparent anterior part of the sclera

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

What does the cornea do?

A

Allows light to reach the retina and acts in some light refraction

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

What does the conjunctiva look like?

A

The thin mucous membrane covering the anterior surface of the eye

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

What does the conjunctiva do?

A

Secretes mucus to lubricate the eyeball

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

What does the optic nerve do?

A

Takes sensory impulses to the brain

19
Q

What is the anterior cavity?

A

The space anterior to the lens that contains the aqueous humor, nourishes the lens and cornea, and shapes the eyeball

20
Q

What is the posterior cavity?

A

The space between the lens and the retina that contains the vitreous humor, presses the retina against the choroid, and shapes the eyeball

21
Q

What does the iris look like?

A

The colored part of the eye made of sheets of smooth muscle

22
Q

What does the iris do?

A

Regulates the amount of light entering the eye arranged circularly and radially

23
Q

What does the pupil look like?

A

The hole in the center of the iris

24
Q

What does the pupil do?

A

Allows light into the eye

25
Q

What does the choroid do?

A

Provides blood supply and absorbs reflected light

26
Q

Where is the choroid?

A

The middle layer of the eye

27
Q

Where is the ciliary body?

A

A part of the choroid in the area where the cornea and sclera meet

28
Q

What does the ciliary body do?

A

Suspensory ligaments attach here, changes the shape of the lens, and secretes aqueous humor

29
Q

What does the suspensory do?

A

Suspend the lens ligaments

30
Q

What does the lens do?

A

Main light refracting structure

31
Q

What does the retina do?

A

Initiates and conducts nerve impulses

32
Q

What is the optic disc?

A

The blind spot - no photoreceptors are located here

33
Q

Where is the lacrimal gland?

A

The lateral surface

34
Q

What direction do tears travel in?

A

Medially from the gland to the duct, and drains into the nasal cavity

35
Q

Which layer of the eye is the vascular layer?

A

Choroid

36
Q

What do the rods and cones synapse with? What synapses next?

A

Bipolar cells, which then synapse with ganglion cells

37
Q

What do the ganglion cells form?

A

Their axons bundle into the optic nerve

38
Q

Where is the blind spot?

A

Where the axons of the ganglion cells bundle and there are no rods and cones present

39
Q

What is the area of the eye with the highest concentration of cones (2)?

A

The fovea, located in the center of the macula

40
Q

What does it mean if the area has a high concentration of cones?

A

It has a high visual acuity

41
Q

Are there more rods or cones in the eye?

A

Rods

42
Q

What do rods absorb?

A

Dimmer light

43
Q

What do cones absorb?

A

Sharp visual acuity and color

From Flashcardlet (133 decks)

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