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10 Cards in this Set
- Front
- Back
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How do receptor cells provide information on the intensity of a stimulus?
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By the number of frequency of action potentials.
Example- louder sounds induce a higher frequency than softer sounds |
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How does the brain interprets sensory information?
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1. Receptor cells are highly specific and contains information.
2. They also send their signals to a specific portion of the brain. |
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What is the ability to sense the changes in pressure?
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Hearing
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What is frequency?
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The number of pressure waves that occur in one second
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How do the stereocilla on receptors of pressure-sensing organs work?
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The direction of the stereocilla decides if the potassium ion channels open and the cell depolarizes the cell or of the potassium ion channels close and the cell hyperpolarizes. It depends on which way it bends.
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What are the parts of the ear?
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Outer Ear:
Tympanic Membrane (eardrum) Middle Ear: Ear ossicles (three tiny bones)- last one called stapes Oval membrane Inner Ear: cochlea (fluid filled cahmber) |
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What are the parts of the eye?
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Sclera (the white of the eye)
Cornea Iris Pupil Retina Fovea |
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What is the difference between rods and cones?
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Rods are sensitive to dim light but not to color. Cones are less sensitive to faint light but are stimulated by colors.
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How do humans distinguish between colors?
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The opsin molecule has three proteins called the blue, green and red opsins and the brain distinguishes color by combining the signals initiated by the proteins.
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How many spindle-shaped taste cells does a taste bud have?
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100 taste cells
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