Exam 3 - Name _______________________ Class...

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Unformatted text preview: Name _______________________ Class Time__________________ Third Exam BIO 365 R Spring 2010 Semester (Color) There are 9 pages and 67 questions, each worth 1.5 points. Good luck! (1-11 ) Mark A on the SCANTRON if the answer is TRUE, and B on the SCANTRON if the answer is False about photoreceptors: ___B___1) Na channels in the membrane of the outer segment are opened when they bind ATP. ___A__2) The difference in the ability to absorb various wavelengths of light among the photopigments in the rods and cones is in the structure of their opsins. ___B___3) Photopigments are located in the membrane of the outer segment ___A___4) Photopigments are located in the membrane of the discs __B____5) The G protein of the photoreceptors is called arrestin ___B___6) Rods are concentrated in the fovea while cones are concentrated in the periphery of the retina ___B___7) In response to light, rods hyperpolarize whereas cones depolarize. ___B__ 8) The photopigments of all cones have the same opsin but each of the 3 cone types differ in the structure of the retinal component of their photopigments. __A___ 9) The photopigment in all rods is rhodopsin ___B___10) The retinal portion of the photopigments is the part that activates transducin. ___A___11) Rods are activated at lower light levels than are cones. (12- 21) True or False. Mark A on the SCANTRON if the answer is TRUE, and B on the SCANTRON if the answer is False 12) __A__ A person whose hand been amputated can still feel sensations in his or her hand when either portions of the face or arm are stimulated. 13) _A___ In phantom limb syndrome, people who have a limb amputated still vividly feel the presence of that limb. 14) __B__The mapping of the body surface in the brain is hard wired and cannot change. 15) _B___In normal persons, the region of the brain that represents a certain part of the body receives innervation from that part of the body and from no other portion of the body surface. 16) _A___ Normally, the region of the brain that represents a certain part of the body receives innervation from that part of the body and less effective (sub-threshold) innervation from parts of the body that are represented in neighboring parts of the brain. 17) __B__Phineas Gage was one of the patients whose epilepsy was relieved by surgically removing a small part of the brain. 18) __A__ one feature of some people who have neglect syndrome is that they deny that anything is wrong. 19) _A___ Photoreceptors are normally depolarized in the dark. 20) __A__Some people with neglect syndromes are unaware of parts of their own bodies and deny that those parts of their bodies belong to them. 21) __B__People who suffer a stroke confined entirely to their right somatosensory cortex (postcentral gyrus) will often deny the existence of parts of their bodies on the left side....
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This note was uploaded on 11/11/2010 for the course BIO 365R taught by Professor Draper during the Fall '08 term at University of Texas at Austin.

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Exam 3 - Name _______________________ Class...

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