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28 Cards in this Set
- Front
- Back
What fraction of the human brain is involved in visual processing?
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1/4
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Which part of the human eye does 3/4 of the focusing of an object?
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Cornea
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Once the image has passed through the cornea, what part of the eye adjusts the focus?
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Lens
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The image focused by the cornea and lens is then produced by the...
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Photoreceptors
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Where are the photoreceptors located?
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The Retina
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The image on the retina is reversed; True or False?
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True. Both left and right and top and bottom.
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Light enters the eye through wich part of the eye?
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Pupil
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Which part of the human eye controls pupil size?
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Iris
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How many photoreceptors are in each human eye?
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about 125 million
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What is the job of the Photoreceptors?
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Turn light into electrical signals
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There are two forms of photoreceptors...Name them.
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Rods and Cones
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Rods or Cones? Which type of photoreceptor is responsible for color vision?
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Cones
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Which three colors found in cones create the spectrum of colors we see?
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Red, Green, and Blue.
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What is the name of the part of the eye that translates the image between the retina and visual cortex?
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Lateral Geniculate Nucleus
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Where is the primary visual cortex located?
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Occipital Lobe in the back of the brain
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Strabismus and squint are terms for which eye impairment?
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cross-eyed
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What is the common name for the tympanic membrane?
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eardrum
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Attached to the tympanic membrane, what is the name of the hammer-like part of the ear that transmits vibration?
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Malleus
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Microscopic hairlike stereocilia are located in the snail-shaped part of the inner ear called the?
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Cochlea
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Which part of the brain is involved in perceiving sound?
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Temporal Gyrus OR Auditory Cortex
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The average person has approximately how many taste buds?
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5,000 to 10,000
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Which part of the brain is involved in perceiving taste?
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Thalamus and Cerebral Cortex
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Messages about tissue damage are picked up by receptors and transmitted to the spinal cord by?
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myelinated and unmyelinated fibers.
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Myelinated or Unmyelinated (C-Fibers)?
Which type of nerve fiber transmits sharp, fast pain such as a pinprick? |
Myelinated
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Myelinated or Unmyelinated (C-Fibers)?
Which type of nerve fiber transmits dull, slow pain, such as a bruise? |
Unmyelinated, C-Fibers
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What is the name of the type of sensory fiber that responds to stimuli that damage tissue?
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Nociceptors
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Pain is transmited up the spinal cord and to the brain by which system?
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The ascending system.
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Which system travels down the spinal cord and supresses pain signals by the release of endorphins?
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The decending system.
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