Week 5

Question 1 of 26

1

Select from the dropdown lists to complete the text.

( Light, Particles, Rays ): waves of electromagnetic radiation.

( Light, Particles, Rays ): travels in straight lines at a constant, very high speed

( Light, Particles, Rays ): discrete packets or 'quanta'.

Explanation

Question 2 of 26

1

❌: transparent window into the eyeball.
❌: dark, circular opening at the centre of the iris, where light enters the eye
❌: enables changing focus using ciliary muscles
❌: light-sensitive membrane in the back of the eye that contains rods and cones, which receive an image from the lens and send it back to the brain through the Optic Nerve.
❌: squishy bits

Drag and drop to complete the text.

Cornea

Pupil

Lens

Retina

Aqueous/Vitreous Humour

Explanation

Question 3 of 26

1

Transduction occurs when:

Select one of the following:

Light enters the pupil
Light hits the retina
The retina sends the image to the Optic Nerve
The lens is in focus

Explanation

Question 4 of 26

1

Recombining rays from various directions to form a single point on the imaging surface is known as:

Select one of the following:

Focusing
Refracting
Accommodation
Transduction

Explanation

Question 5 of 26

1

Focusing is the job of the:

Select one or more of the following:

Cornea
Pupil
Lens
Retina

Explanation

Question 6 of 26

1

Select from the dropdown lists to complete the text.

The ( cornea, lens ) refracts light at a constant amount.

The ( cornea, lens ) refracts light by a variable amount.

Explanation

Question 7 of 26

1

❌: normal refractive condition
❌: short-sightedness
❌: long-sightedness
❌: inability to change accommodation
❌: different focal lengths for different orientations

Drag and drop to complete the text.

Emmetropia

Myopia

Hyperopia/Hypermetropia

Presbyopia

Astigmatism

Explanation

Question 8 of 26

1

Which of the following is true for myopia:

Select one or more of the following:

Focal length is too short
Light is focused behind the retina
Need concave corrective lenses
Occurs with old age

Explanation

Question 9 of 26

1

Select from the dropdown lists to complete the text.

Rods: ( high, low ) sensitivity; ( daytime, night vision )

Cones: ( high, low ) sensitivity; ( daytime, night vision )

Explanation

Question 10 of 26

1

❌ & ❌ pass electrical impulses to ❌ cells (via ❌/❌/❌ cells). Ganglion cells have long ❌ that exit the eyeball via a bundle called the ❌. Where the optic nerve leaves the eye, there are no ❌ - this is the blind spot.

Drag and drop to complete the text.

Rods

cones

ganglion

bipolar

amacrine

horizontal

axons

optic nerve

photoreceptors

Explanation

Question 11 of 26

1

There are many photoreceptors in the optic disk.

Select one of the following:

True
False

Explanation

Question 12 of 26

1

Receptive fields for foveal vision are:

Select one or more of the following:

Smaller
Larger
Densely packed
Sparsely packed

Explanation

Question 13 of 26

1

Retinal ganglion cell axons terminate in the

Select one of the following:

Lateral Genicular Nucleus
Optic Nerve
Vitreous Humour
Occipital Lobe

Explanation

Question 14 of 26

1

Properties of OFF Centre cells:

Select one or more of the following:

Light on the inner portion causes a decrease in ganglion cell activity
Tell us how bright an area is
Help detect local luminance decrements
Cancel out the effect of ON Centre cells

Explanation

Question 15 of 26

1

Having both OFF and ON Centre cells makes it more difficult to go below the spontaneous firing rate.

Select one of the following:

True
False

Explanation

Question 16 of 26

1

Layers ❌, ❌, and ❌ are from the contralateral eye.

Layers ❌, ❌, and ❌ are from the ipsilateral eye.

Drag and drop to complete the text.

1

4

6

2

3

5

Explanation

Question 17 of 26

1

Magnocellular Cells: ❌ RFs, ❌ response, ❌ sensitivity, process ❌

Parvocellular Cells: ❌ RFs, ❌ response, ❌ sensitivity, process ❌

Drag and drop to complete the text.

large

fast

high

motion

small

slow

low

colour

Explanation

Question 18 of 26

1

The majority of the focusing power in the eyes comes from the lens

Select one of the following:

True
False

Explanation

Question 19 of 26

1

High pressure of the aqueous humour can cause:

Select one or more of the following:

Glaucoma
Retinal damage
Blindness
Myopia

Explanation

Question 20 of 26

1

Select from the dropdown list to complete the text.

When our pupils constrict, our depth of focus ( increases, decreases ).

Explanation

Question 21 of 26

1

Select from the dropdown lists to complete the text.

( Amacrine, Horizontal ) Cells: receptors synapse with bipolar cells
( Amacrine, Horizontal ) Cells: bipolar cells synapse with ganglion cells

Explanation

Question 22 of 26

1

When only rods are active, vision is ❌; when rods cannot function, vision is ❌; when both rods and cones are active, vision is ❌.

Drag and drop to complete the text.

scotopic

photopic

mesopic

Explanation

Question 23 of 26

1

Select from the dropdown list to complete the text.

Axons from the ( nasal, temporal ) side of the retina don't crossover at the optic chiasm.

Explanation

Question 24 of 26

1

How many layers does each LGN have?

Select one of the following:

6 - 2 magnocellular & 4 parvocellular
4 - 2 magnocellular & 2 parvocellular
6 - 4 magnocellular & 2 parvocelluolar
4 - 2 contralateral and 2 ipsilateral in each

Explanation

Question 25 of 26

1

OFF Centre cells are sombrero shaped

Select one of the following:

True
False

Explanation

Question 26 of 26

1

Ganglion Cells:

Select one or more of the following:

Only signal the 'edges' in patters
Respond to absolute rates of intensity
Nothing changes when the overall level of illumination goes up or down
Have antagonistic receptive fields
The surrounding area does the same job as the centre of the cell

	Created by Eloise C about 7 years ago

2 Perception (Week 5 - Light, Eye, and the Brain) Quiz on Week 5, created by Eloise C on 15/04/2017.

Question 1 of 26

Select from the dropdown lists to complete the text.

Light Particles Rays( Light, Particles, Rays ): waves of electromagnetic radiation. Light Particles Rays( Light, Particles, Rays ): travels in straight lines at a constant, very high speed Light Particles Rays( Light, Particles, Rays ): discrete packets or 'quanta'.

Explanation

Question 2 of 26

Drag and drop to complete the text.

Explanation

Question 3 of 26

Transduction occurs when:

Select one of the following:

Explanation

Question 4 of 26

Recombining rays from various directions to form a single point on the imaging surface is known as:

Select one of the following:

Explanation

Question 5 of 26

Focusing is the job of the:

Select one or more of the following:

Explanation

Question 6 of 26

Select from the dropdown lists to complete the text.

The cornea lens( cornea, lens ) refracts light at a constant amount. The cornea lens( cornea, lens ) refracts light by a variable amount.

Explanation

Question 7 of 26

❌: normal refractive condition ❌: short-sightedness ❌: long-sightedness ❌: inability to change accommodation ❌: different focal lengths for different orientations

Drag and drop to complete the text.

Explanation

Question 8 of 26

Which of the following is true for myopia:

Select one or more of the following:

Explanation

Question 9 of 26

Select from the dropdown lists to complete the text.

Rods: high low( high, low ) sensitivity; daytime night vision( daytime, night vision ) Cones: high low( high, low ) sensitivity; daytime night vision( daytime, night vision )

Explanation

Question 10 of 26

❌ & ❌ pass electrical impulses to ❌ cells (via ❌/❌/❌ cells). Ganglion cells have long ❌ that exit the eyeball via a bundle called the ❌. Where the optic nerve leaves the eye, there are no ❌ - this is the blind spot.

Drag and drop to complete the text.

Explanation

Question 11 of 26

There are many photoreceptors in the optic disk.

Select one of the following:

Explanation

Question 12 of 26

Receptive fields for foveal vision are:

Select one or more of the following:

Explanation

Question 13 of 26

Retinal ganglion cell axons terminate in the

Select one of the following:

Explanation

Question 14 of 26

Properties of OFF Centre cells:

Select one or more of the following:

Explanation

Question 15 of 26

Having both OFF and ON Centre cells makes it more difficult to go below the spontaneous firing rate.

Select one of the following:

Explanation

Question 16 of 26

Layers ❌, ❌, and ❌ are from the contralateral eye. Layers ❌, ❌, and ❌ are from the ipsilateral eye.

Drag and drop to complete the text.

Explanation

Question 17 of 26

Magnocellular Cells: ❌ RFs, ❌ response, ❌ sensitivity, process ❌ Parvocellular Cells: ❌ RFs, ❌ response, ❌ sensitivity, process ❌

Drag and drop to complete the text.

Explanation

Question 18 of 26

The majority of the focusing power in the eyes comes from the lens

Select one of the following:

Explanation

Question 19 of 26

High pressure of the aqueous humour can cause:

Select one or more of the following:

Explanation

Question 20 of 26

Select from the dropdown list to complete the text.

When our pupils constrict, our depth of focus increases decreases( increases, decreases ).

( Light, Particles, Rays ): waves of electromagnetic radiation.

( Light, Particles, Rays ): travels in straight lines at a constant, very high speed

( Light, Particles, Rays ): discrete packets or 'quanta'.

The ( cornea, lens ) refracts light at a constant amount.

The ( cornea, lens ) refracts light by a variable amount.

❌: normal refractive condition
❌: short-sightedness
❌: long-sightedness
❌: inability to change accommodation
❌: different focal lengths for different orientations

Rods: ( high, low ) sensitivity; ( daytime, night vision )

Cones: ( high, low ) sensitivity; ( daytime, night vision )

Layers ❌, ❌, and ❌ are from the contralateral eye.

Layers ❌, ❌, and ❌ are from the ipsilateral eye.

Magnocellular Cells: ❌ RFs, ❌ response, ❌ sensitivity, process ❌

Parvocellular Cells: ❌ RFs, ❌ response, ❌ sensitivity, process ❌

When our pupils constrict, our depth of focus ( increases, decreases ).

( Amacrine, Horizontal ) Cells: receptors synapse with bipolar cells
( Amacrine, Horizontal ) Cells: bipolar cells synapse with ganglion cells

Axons from the ( nasal, temporal ) side of the retina don't crossover at the optic chiasm.