2009 ch 49 BBB (1)

2009 ch 49 BBB (1) - Ch 49 VIEW Multiple Choice Identify...

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Ch 49 VIEW Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Which of the following is a sensation and not a perception? a. the smell of natural gas escaping from an open burner on a gas stove b. a nerve impulse induced by sugar stimulating sweet receptors on the tongue c. the sound of a fire-truck siren as it passes by your car d. the unique taste of french fries with cheese e. seeing the colors in a rainbow ____ 2. Why are we able to differentiate tastes and smells? a. Because we are able to see what we are tasting, the brain uses this information to distinguish taste from smell. b. The brain distinguishes between taste, arising from interoreceptors, from smell arising from exteroreceptors. c. Taste receptors are able to detect fewer molecules of the stimulus, which means these receptors will initiate a receptor potential before smell receptors do. d. The action potentials initiated by taste receptors are transmitted to a separate region of the brain than those initiated by receptors for smell. e. The sensory region of the cerebral cortex distinguishes something we taste from something we smell by the difference in the action potential. ____ 3. Sensory receptors have all of the following functions in common except a. processing information through graded potentials. b. increased permeability to sodium and potassium ions. c. conversion of stimulus energy to membrane potential. d. strengthening of stimulus energy sent to the nervous system. e. conduction of impulses to the central nervous system. ____ 4. If a stimulus is to be perceived by the nervous system, which part of the sensory pathway must occur first ? a. integration b. reception c. transduction d. transmission e. amplification ____ 5. What is the correct sequence of events that would lead to a person hearing a sound? 1. transmission 2. transduction 3. integration 4. amplification a. 1, 2, 3, 4 b. 2, 4, 1, 3 c. 3, 1, 4, 2 d. 3, 1, 2, 4 e. 1, 4, 2, 3 ____ 6. Immediately after putting on a shirt, your skin feels itchy. However, the itching stops after a few minutes and you are unaware that you are wearing a shirt. Why? a. Accommodation has increased.
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b. Receptor amplification has decreased. c. Motor unit recruitment has decreased. d. Sensory adaptation has occurred. e. Transduction has increased. ____ 7. Which of the following is a good example of sensory adaptation? a. cones in the human eye failing to respond to light in the infrared range b. rods in the human eye responding to mechanical stimulation from a blow to the back of the head so that a flash of light is perceived c. olfactory receptors ceasing to produce receptor potentials when triggered by the smell of the second batch of cookies you are baking d. hair cells in the utricle and saccule responding to a change in orientation when you bend your neck forward after you have been reading a book e. hair cells in the organ of Corti not responding to high-pitched sounds after you have
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This note was uploaded on 05/06/2010 for the course BIOLOGY 02541 taught by Professor Jcobs during the Spring '10 term at Wilson Tech.

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2009 ch 49 BBB (1) - Ch 49 VIEW Multiple Choice Identify...

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