Ch4.2- The Visual system Flashcards
This part of the eye lines the inner surface of the eye.
The part of the eye that contain photoreceptors, where transduction of light occurs:
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
j) Optic Chaism
f) Retina
The opening in the center of the iris that regulates light by contracting and expanding is called….
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
j) Optic Chaism
c) Pupil
The transparent, clear disc structure that focuses light into the back of the eye is called…
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
j) Optic Chaism
a) Lens
The clear protective layer that covers the front of the eye and helps the eye to focus is called the…
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
b) Cornea
The round muscle that regulates the size of the pupil is called…
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
j) Optic Chaism
c) Iris
The white, outer surface of the eye is called the…
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
j) Optic Chaism
e) Sclera
Information from photoreceptors are transmitted to these cells, which then fire through the optic nerve. This is called ______
is it further to the front of the eye or the back?
g_______ cells
ganglion cells. further to the front.
There are two types of photoreceptors; this type perceives wavelengths of colour, and cluster around a central region of the retina. There are 6-8 million of these.
- Rods
- Cones
- Fovea
Cones
The central region of the retina, where cones photoreceptors cluster around are called
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
j) Optic Chaism
g) Fovea
There are two types of photoreceptors; this type works best under low light conditions, and perceives mostly blacks and greys. There are 12 million of these.
- Rods
- Cones
- Fovea
Rods
The blind spot occurs in the _______ as a result of the _____
a) Lens
b) Cornea
c) Iris
d) Pupil
e) Sclera
f) Retina
g) Fovea
h) Optic nerve
i) Eye muscle
j) Optic Chaism
f) Retina, as a result of the h) Optic nerve.
The process by which rods and cones become increasingly sensitive to light under low illumination is called
a) Trichromatic theory (or Young-Helmholtz theory)
b) Dark adaptation
c) Opponent-process theory
d) Binocular disparity
b) dark adaptation
The process by which colour vision is determined by three different cone types that are sensitive to long, medium and short wavelengths of light. (RGB, respectively)
a) Trichromatic theory (or Young-Helmholtz theory)
b) Dark adaptation
c) Opponent-process theory
d) Binocular disparity
a) Trichromatic theory
The theory that states we perceive colour in terms of opposing pairs; red to green, yellow to blue, white to black.
a) Trichromatic theory (or Young-Helmholtz theory)
b) Dark adaptation
c) Opponent-process theory
d) Binocular disparity
c) Opponent-process theory
The tendency to see a negative afterimage after looking away from a colour image is best explained by:
a) Trichromatic theory (or Young-Helmholtz theory)
b) Dark adaptation
c) Opponent-process theory
d) Binocular disparity
c) opponent-process theory
The part of the brain where the optic nerves cross at the midline is called ____
optic chaism
This nucleus in the thalamus handles the processing of visual information.
a) Longitudinal Geniculate Nucleus
b) Lateral Geniculate Nucleus
c) Lateral Genesis Nucleus
d) Long Genesis Nucleus
b) Lateral Geniculate Nucleus
These cells in the occipital lobe’s primary visual cortex respond selectively to simple and specific angles of a stimulus.
F_____ ________ cells
feature detection cells.
Information from the occipital lobe’s primary visual cortex is sent to the secondary visual cortex, where it splits into 2 streams.
This stream extends into the parietal lobe.
It is specialised for spatial perception.
a) ventral stream
b) dorsal stream
b) dorsal “where” stream extends into the parietal lobe.
Information from the occipital lobe’s primary visual cortex is sent to the secondary visual cortex, where it splits into 2 streams.
This stream extends into the temporal lobe.
It is specialised for object recognition.
a) ventral stream
b) dorsal stream
a) ventral “what” stream extends into the temporal lobe.
Damage to this stream would result in prosopagnosia, or face blindness.
a) ventral stream
b) dorsal stream
a) ventral stream
Perceptual constancy is the ability to perceive objects as having…..
Perceptual constancy is the ability to perceive objects as having consistent shape, size and colour despite changes in perspective.
Perceptual constancies are influenced by
a) top down processing
b) bottom up processing
a) top down processing, or prior expectation, affects perceptual constancies.
This stream is associated with visually guided movement.
a) ventral stream
b) dorsal stream
b) dorsal stream
think: dorsal WHERE stream-
dorsal as in dorsal fin, for like a shark, guides it through the water.
Distance cues from both eyes are called
a) convergence
b) retinal disparity
c) monocular cues
d) binocular cues
e) accomodation
d) binocular cues
depth cues from one eye are called
a) convergence
b) retinal disparity
c) monocular cues
d) binocular cues
e) accomodation
c) monocular cues
