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| 1 . |
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Although we often assume that our sense organs are reporting a complete picture of the world to our brains, in fact the world is full of stimuli (very low frequency sound, cosmic rays, electrical fields, etc.) that our sense organs cannot detect. This situation is best characterized as a failure of our sense organs to ______ these stimuli. (Concept 49.1 ) [Hint]
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| 2 . |
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You look all over for your glasses and then find them pushed back onto your forehead. This error could be attributed to ______. (Concept 49.1) [Hint]
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| 3 . |
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A fish detects vibrations in the water around it by means of its lateral lines, rows of sensory receptors along each side of the body. Based on what you know about sensory receptors, the lateral line receptors are probably which of the following? (Concept 49.1) [Hint]
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| 4 . |
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If we stand up too quickly, blood pressure and, hence, blood flow to the brain will decrease. Which receptors will respond to this decrease in blood pressure? (Concept 49.1) [Hint]
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| 5 . |
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Which one of the following classes of sensory receptors consists of neurons with naked dendrites? (Concept 49.1) [Hint]
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| 6 . |
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Compound eyes are advantageous for small prey species to detect a potential predator because _____. (Concept 49.1) [Hint]
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| 7 . |
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Instead of shouting, "Don't fire until you see the whites of their eyes!" at Bunker Hill, Col. William Prescott could have said, "Don't shoot until you see their ______!" (Concept 49.2) [Hint]
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| 8 . |
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Which of the following correctly traces the path of light into your eyes? (Concept 49.2) [Hint]
| | lens, cornea, pupil, retina |
| | cornea, pupil, lens, retina |
| | cornea, lens, pupil, retina |
| | lens, pupil, cornea, retina |
| | pupil, cornea, lens, retina |
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| 9 . |
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The fluid in the anterior chamber of the eye is the _______. (Concept 49.2) [Hint]
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| 10 . |
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Correct focusing of the image on the retina in humans is achieved by changing the ______. (Concept 49.2) [Hint]
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| 11 . |
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When you move an object from 15 inches in front of your eye to 10 inches in front of your eye, the lenses _____. (Concept 49.2) [Hint]
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| 12 . |
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Incapacitating the muscles of a mammalian eye would result in an inability _____. (Concept 49.2) [Hint]
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| 13 . |
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A baby is born with the normal number and distribution of rods, but no cones. We would expect that the baby's vision would be _______. (Concept 49.2) [Hint]
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| 14 . |
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While driving your car at night, you notice that you have poor peripheral vision. You might suspect this problem to be associated with which part(s) of the eye? (Concept 49.2) [Hint]
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| 15 . |
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The greatest concentration of cone receptors is found at the ______. (Concept 49.2) [Hint]
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| 16 . |
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The body uses the vitamin A precursors in carrots to make a substance called retinal, which _____. (Concept 49.2) [Hint]
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| 17 . |
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Which one of the following occurs when you move from a bright area into a darkened room? (Concept 49.2) [Hint]
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| 18 . |
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Difficulty in distinguishing red from green is most likely due to a defect in which cells? (Concept 49.2) [Hint]
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| 19 . |
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A human born with nonfunctional rhodopsin would ______. (Concept 49.2) [Hint]
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| 20 . |
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Once the light hits the retina, it follows specific neural pathways to the brain. Place the neural components in order. (Concept 49.2) [Hint]
| | photoreceptors, bipolar cells, ganglion cells (optic nerve) |
| | horizontal cells, ganglion cells, bipolar cells, photoreceptors |
| | photoreceptors, ganglion cells, horizontal cells, amacrine cells |
| | photoreceptors, horizontal cells, ganglion cells, bipolar cells |
| | bipolar cells, photoreceptors, ganglion cells |
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| 21 . |
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In the vertebrate eye, one kind of sensory processing occurs when light falls on a single photoreceptor cell and excites that cell and nearby receptors, whereas more distant photoreceptor cells are inhibited from transmitting impulses. This phenomenon is called _____. (Concept 49.2) [Hint]
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| 22 . |
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The organ of Corti is found ______. (Concept 49.3) [Hint]
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| 23 . |
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Organs in the inner ear of mammals are the cochlea, semicircular canals, and vestibule. Match them to their functions. (Concept 49.3) [Hint]
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| 24 . |
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Sitting too close to the amplifiers at a concert may ________. (Concept 49.3) [Hint]
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| 25 . |
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The brain determines the loudness of a sound from the ______. (Concept 49.3) [Hint]
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| 26 . |
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If the basilar membranes in the ears were equal in width and flexibility along their length, how would this affect a person's sense of hearing? (Concept 49.3) [Hint]
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| 27 . |
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A person born without otoliths in the ears would be _____. (Concept 49.3) [Hint]
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| 28 . |
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Animals living in terrestrial environments use two senses—taste and smell—to respond to their environment. Animals living in aquatic environments, however, make no distinction between taste and smell. Which response might explain this difference? (Concept 49.4) [Hint]
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| 29 . |
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Why is having a hydrostatic skeleton, rather than an internal skeleton, more advantageous to an earthworm? (Concept 49.5) [Hint]
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| 30 . |
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Which statement about contraction of a sarcomere is false? (Concept 49.6) [Hint]
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| 31 . |
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What do all muscle tissues have in common? (Concept 49.6) [Hint]
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