Final2004NoAns2Web

Final2004NoAns2Web - Final Examination for BISC/PSYC 230...

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Final Examination for BISC/PSYC 230, Spring 2004.  Please remember that the material  covered last year is not the same as that covered this year, and that some of the questions  may be irrelevant for this semester’s material. 1. T       F Greek philosophers thought that mental activity was a manifestation of  fluid pressure, but the Romans correctly deduced that perception, thought and action were  the result of electrical activity in the brain. 2. T       F Descartes launched the “mind/brain” debate by making the claim that all  mental activity could be explained on the basis of machine-like principles. 3. T       F What Penfield described as the “sensory homunculus” is a map or  diagram that shows where on the postcentral gyrus a touch of the skin will be registered. 4. T       F  The brain stem contains numerous nuclei that are involved in the  regulation of autonomic function. 5. T       F A spike is transmitted down the axon by an instantaneous process called  “electrotonic influence”, wherein all the sodium channels along the full length of the axon  are made to open simultaneously. 6. T       F A spike arrives at a presynaptic terminal, causing the release of a  neurotransmitter.  The neurotransmitter crosses the synaptic cleft and activates a potassium  channel in the postsynaptic membrane.   An intracellular electrode inside the postsynaptic  cell records the event as a hyperpolarization, which is generally described as an ipsp. 7. T       F The lens is able to bend light by a process known as “refraction.”  The  curvature of the lens is such that light coming from a single location in the scene to be  photographed (or seen) is bent by a different amount depending on where on the lens the  light falls.  Further, as the light leaves the lens, it arrives at the film plane at just one location,  no matter where it came through the lens. 8. T       F We now know that color vision requires three cones that respond  differently to the various wavelengths of light.   The evidence in support of this conclusion is  so abundant that we can dismiss Hering’s claims that red is perceptually opposite of green,  and blue is opposite of yellow. 9. T       F There are over 100 million receptors in each retina, but only about 1.5  million ganglion cells.   Therefore, except in the fovea, a great many receptors influence each  ganglion cell.
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10. T       F The neurons in primary visual cortex are said to be orientation selective. 
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