2007_Ex2_Ans - BISC/PSYC 230Lg Second Midterm Spring 2007...

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BISC/PSYC 230Lg Second Midterm Spring 2007 Name ________________________ TA code: Jerome: 1, Martin: 2, Cheryl: 3, Young: 4 ID number ____________________ (Place TA code in column K on the scantron sheet.) 1 The lecture portion of this exam has 7 pages and 65 questions. Please be sure that you have a complete examination. The lab portion follows the lecture exam and is comprised of 10 multiple choice questions on pages 7 and 8. Please enter your answers on the blue machine-grading forms that we shall supply. Be sure to enter your name and student ID. Enter your TA using the code shown above. Good luck with the exam, from all of us on your teaching staff. For each of the following True/False questions, please mark your answer sheet with: 1 = True and 2 = False (one point each). 1. T A tuning fork will produce a smooth oscillation that is similar to a sine wave, wherein the number of oscillations per second determines the pitch that will be heard. 2. F A complex sound consists of a mixture of simple sinusoidal oscillations of a medium such as air. 3. F The range of human perception for sound is from 10 hz to 10,000 hz. 4. T Activation of the auditory nerve on one side of the head sends messages to primary auditory cortex on both sides of the brain. 5. F One cannot localize a sound unless the time of arrival at the two ears is separated by at least 2 ms. 6. T Sound intensity at the two ears as well as time of arrival are cues for localizing the source of a sound. 7. T A very loud sound is able to kill hair cells, and if one uses a specific frequency of sound the loss will be at a specific location in the basilar membrane. 8. F Greene said that complex sounds are really just a mixture of pure tones, and that we identify these sounds, and even can identify several at once, because each pure-tone component activates a specific location on the basilar membrane. 9. F Von Frey correctly concluded that the cornea of the eye has only free nerve endings, and is sensitive only to pain. 10. T The classical view is that the pain message that enters the spinal cord travels up to the brain in the fiber tract known as the ventrolateral sector.
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2 11. F The pain gating theory of Melzack & Wall proposed that light touch could inhibit transmission of the pain message, causing the T cell to stop firing. 12. T Melzack & Wall’s claims about a spinal cord pain gate did not prove to be valid, but pain gates have been discovered in at least two locations in the brain itself. 13. T Enkephalins are short-chain polypeptides that serves as neural transmitters at pain gates. 14. T A study of one person having congenital insensitivity to pair found no evidence of a late, slow- traveling brain wave that is likely carrying the pain message. 15.
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This note was uploaded on 02/28/2008 for the course BISC 320L taught by Professor Baker,aparicio during the Fall '07 term at USC.

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2007_Ex2_Ans - BISC/PSYC 230Lg Second Midterm Spring 2007...

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