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8 Cards in this Set
- Front
- Back
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Explain how the mammalian ear functions as a hearing organ
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Sound waves cause the eardrum to vibrate, transmit movement to the oval window which set in motion the fluid in the inner ear
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Explain how the mammalian ear functions to maintain body balance and equilibrium
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Inner ear has 3 semi-arc. canals and 2 chambers. All equi. structures open by bending of hairs on hair cells which act as mechanoreceptors
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describe the 6 types of sensory receptors and where they would be found on the body
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Mechanoreceptors (skin, ear, skeletal muscle), thermoreceptors (free nerve endings), pain receptors (free nerve endings), chemoreceptors (blood vessel wall, tongue, nose), osmoreceptors (hypothalamus), and photoreceptors (eye)
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what is pain
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perception of injury to some body region
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how do olfactory receptors play a role in smell and taste
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olfactory receptors are located in the cilia of neurons detecting odors (smell) and thus contributing to taste
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differentiate between simple, complex, compound, and camera eyes, give examples of each
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Lack eyes but respond to light (earthworms), brain interprets intensity of light (flat worms), contains many closely packed rhabdomeric units (insects), eyeball is structured along the lines of a camera, has a lens, and unlike the compound has to focus (humans)
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describe how rods and cones are different
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cones are stimulated by bright light while rods are extremely sensitive to light and enable you to see at night but only in shades of gray
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explain what nearsightedness and farsightedness means in terms of shape of eye and focal point
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nearsightedness means eyeball is too long and focal point is infront of retina; farsightedness is when the eyeball is too short and focal point is behind retina
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