Brainscape's Knowledge GenomeTM

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


See full index

organs of special senses and endocrine systems > Physiology Of Vision > Flashcards

Physiology Of Vision Flashcards

1
Q

What is a particle of light called

A

Photon

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

What is the function of the lens

A

Focuses light onto the retina

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

What is the function of the cornea

A

Refracts light entering eye

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

What is lens accomidation

A

Process where lens curve increases or decreases to focus on an object

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

How does the lens change shape

A

Ciliary muscles contract

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

How do ciliary muscles attach to the lens

A

By Zonalas (suspensory ligament)

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

How does the pupil dilate

A

Radial fibres in iris

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

How does the pupil constrict

A

Circular fibres in iris

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

Unlike ocular humour, which humour is not constantly replaced

A

Vitreous humour

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

Which photoreceptor cells are used for bright light

A

Cones

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

What type of cells are found in the middle layer of the retina

A

Internet Ron

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

Which layer of the retina are rods and cones found

A

Outer layer

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

What cells are found in the inner layer of the retina

A

Ganglion cells

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

What is the optic disc

A

Blind spot with no photoreceptor cells as is where the optic nerve leaves the eye and blood vessels enter

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

Name the internet Ron cells in the middle layer of the retina

A

Bipolar neutrons
Horizontal neutrons
Amacrine cells

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

What is the function of interneurons

A

Connect sensory cells and ganglion axons

17
Q

What is the function of the Macula Lutea

A

Part of the retina is responsible for detailed vision due to the presence of the Fova Centralis (high conc of photoreceptor cells)

18
Q

Name the photosynthetic pigments found rods and cones

A

11- cis retinal
All-trans retinal

19
Q

How do rods and cones react to light

A

Get hyperpolarised
(Light removes cGMP, closes CNG channels, hyper-polarises membrane)

20
Q

Describe how an image is formed

A

Light passes through cornea
Pass through pupil (size gets altered by radial and circular smooth muscles)
Light strikes lens (curve altered by ciliary muscle in order to converge light onto retina)
Strikes retina and hit photoreceptor cells
Nerve impulses sent from optic nerve to cerebral hemisphere

(Some light reflected back at Tapetum Lucidum in low light)

21
Q

How does the brain process the image from the retina

A

Inverts it to the correct way using other senses

organs of special senses and endocrine systems (16 decks)

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