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| Selects, analyzes, and filters information until only the most important remain. |
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| The part of the electromagnetic spectrum available to humans. Part the eye is sensitive to: 400nm(short waves, violet)-700nm(long waves,red) |
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| COLORED part of the eye that is a circular muscle that can expand and contract. |
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| Clear COVERING of eye. Focuses light on the back of eye to make a crisp image. Turns image of object upside down. |
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| Keeps object being viewed in focus even as it changes distance. Does this by squeezing or relaxing |
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| Opening at the front of the eye through which light passes. |
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| Visual receptors for DIM light that produce only and white sensations. Sensitive to BLUE light and insensitive to red light. Much more sensitive to light than its counterpart. 100 million of these in each eye. |
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| Visual receptors for and daylight visual activity. Produce color sensation to pick up fine detail. 6.5 million of these in each eye. |
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| Most frequently occurring receptor. |
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| Register the sensations: light touch, pressure, pain, cold, heat, etc. Number of receptors=sentivity |
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| Overuse of hair cells from very loud sounds. Dead hair cells can never be replaced. Constant exposure to 85 decibels can cause this. |
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| 5 million receptor cells embedded in the lining of the upper nasal passages (nostrils). Sensation of SMELL: odors are a combination of receptors. |
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Definition
| Substances whose odor affect the BEHAVIOR of other members of the same species. |
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| "Pit" in that back of the eye. CENTER of visual field containing ONLY CONES. |
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| Area of the retina lacking visual receptors. "Hole" in retina. |
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| Light-sensitive layer of cells at the back of the eye. |
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| Malleus-hammer,incus-anvil,stape-stirrup. |
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| Theory of color vision based on three coding systems (red or green, yellow or blue, black or white). Vision analyzes these colors into "either-or" messages. One part of the pair blocks the other from coming through so you can't have redish green but you can have redish yellow b/c they aren't in the same color pair. |
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| Theory of color based on THREE CONE types: red, green, blue. Other colors result from a combination of RGB. Problem: there are actually four primary colors you can't get by mixing: yellow, red ,green, and blue. |
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Definition
| Bending of hair cells trigger a nerve impulse to the brain. |
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Definition
| LIGHT-sensitive PIGMENT in the RODS. Night vision due to increase of this. |
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Definition
| Chemical in rhodopsin-night vision pigments. This requires Vitamin A found in carrots but can only improve night vision if there is a deficiency in Vitamin A. |
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Definition
| Holds that sounds up to 4,000 Hz are converted to nerve impulses that match the frequency of each sound. |
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Definition
| Poor transfer of sounds from the eardrum to the inner ear. Transfer of vibrations to inner ear is WEAK. This deafness can be OVERCOME with hearing aid. |
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Definition
| Deafness caused by damage to the hair cells or auditory nerve. CANNOT be helped with hearing aids b/c auditory message are blocked from reaching the brain. However artificial hearing systems can help. |
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Definition
| Theory that higher and lower TONES excite DIFFERENT areas of the cochlea. Higher tones at base of cochlea and lower move hair cell to outer tip of cochlea. |
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| Loss or impairment of SMELL. |
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| Theory that odors are related to the SHAPES of chemicals molecules b/c different shaped pockets exist on the surface the olfactory |
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Definition
| Receptor organ for taste. |
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