Visual perception quiz 1 Flashcards
(19 cards)
Our ability to detect objects under dim lighting conditions is due mainly to x called x
A. Photoreceptors, rods
B. Photo-pigments, rods
C. Photoreceptors, cones
D. Cells, photo-pigments
A. Photoreceptors, rods
Which processes occurs first in visual perception?
Reception
The human eye responds to which type of energy?
Electromagnetic
The size of a pupil is controlled by the
iris
Which structure of the eye is responsible for receiving and transducing electromagnetic energy into nerve impulses to be sent to the cortex?
Retina
In visual perception, transmission involves
A. Neural information passing along the optic nerve to the brain
B. The detection of electromagnetic energy at the receptor cells
C. Electrochemical energy changing into electromagnetic energy
D. Light passing through the cornea and the lens
A. Neural information passing along the optic nerve to the brain
George woke early in the morning and could only see the outlines of the furniture in his room due to the x in his eyes functioning. When he turned on the bedlamp he could see the colour and details of the furniture due to the x in his eyes now functioning.
A. Cones; rods
B. Rods; cones
B. Rods and cones
Which one of the following is the correct sequence of structures light must pass through in the eye?
A. Lens, pupil, retina, cornea
B. Cornea, pupil, lens, retina
C. Iris, lens, pupil, retina,
D. Cornea, lens, pupil, retina
B. Cornea, pupil, lens, retina
Visual Acuity is best when an image is focused on the:
Fovea
Which one of the following statements is correct about visual receptors?
A. There are more cones than rods in the peripheral retina.
B. Rods operate best in bright light and provide fine details of objects.
C. Rods are mainly involved in peripheral vision.
D. Cones do not provide any colour information.
C. Rods are mainly involved in peripheral vision.
The lens is a transparent, convex structure behind the iris that changes shape to focus light into an image on the retina. The lens either bulges or elongates depending on whether the object is closer or further away from the viewer. This process is known as
Accomadation
The visual perception process has six common stages for all forms of stimuli. In order, they are:
Reception, transduction, transmission, selection, organisation, interpretation
With reference to visual perception, what does the process of transduction involve?
A. Sensory information is collected by the senses.
B. Sensory information is carried to the brain for further processing.
C. Light energy is converted into electrochemical energy.
D. Light energy is received by the brain.
C. Light energy is converted into electrochemical energy.
Which of the following statements about visual
receptors is incorrect?
A. Rods can respond in low levels of light but not in bright light
B. Cones can respond in bright light but not in low levels of light
C. Rods and cones both distinguish black and white
D. Rods and cones both distinguish colours
D. Rods and cones both distinguish colours
If you are driving a car during the day your brain will not receive any inforamtion about the part of the light stimulus that falls on your retina’s blind spot because:
there are no photoreceptors in the blind spot
Which statement is incorrect about cones?
A. Cones have a visual acuity.
B. The fovea contains only cones.
C. There are approximately 6.5 million cones in each retina.
D. Cones are responsible for black and white vision.
D. Cones are responsible for black and white vision.
Which statement is incorrect about rods?
A. Rods have low visual acuity.
B. Rods are mainly on the outer areas of the retina
C. Rods function best in bright light.
D. Rods are reponsible for peripheral vision.
C. Rods function best in bright light.
The primary visual cortex contains feature detector cells specialsed to respond to specific features of the visual stimuli, for example lines, edges, spots, colour, shape of motion. This occurs in the x stage of visual perception.
Selection
The stage of the visual perception process that is involved in assigning meaning to sensory stimuli so we understand what it represents in the external world is known as
Interpretation
