sample_midterm_3_2006

sample_midterm_3_2006 - YOUR NAME_ Social Security #_ Your...

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YOUR NAME__________________________ Social Security #_________________ GO ON TO NEXT PAGE!!!! 1 Your signature______________________ NPB100 Spring Quarter 2006 Midterm 3 Please check this box if you do not want your exam returned in the bins in the hallway… Question Score Total 1 7 2 15 3 16 4 15 5 12 6 5 7 10 8 9 9 3 10 8 TOTAL 100
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YOUR NAME__________________________ Social Security #_________________ GO ON TO NEXT PAGE!!!! 2 Question 1. (Total Points 7) Why do photoreceptors have a higher metabolic rate while you sleep than they do during the daytime? Question 2. (Total Points 15) 2a. (12 pts) Considering only the OFF pathways in the retina, fill in the diagram below to show the activation of the direct and indirect pathways (use + to show excitation, – to show inhibition, and 0 to show no effect). Then plot the responses of the middle six ganglion cells below the same way we did in class. Light Dark Responses (note that lateral inhibition is not as strong as direct excitation) 2b. (3pts) Briefly explain how lateral inhibition in the retina emphasizes edges.
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YOUR NAME__________________________ Social Security #_________________ GO ON TO NEXT PAGE!!!! 3 Question 3. (Total Points 16) 3a. (3 pts) Increasing the K+ concentration in the endolymph (the fluid surrounding the top of the hair cell) will have what effect on the membrane potential of a hair cell when an auditory stimulus moves the hairs toward the tallest stereocillium? (Circle one answer
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This note was uploaded on 05/02/2008 for the course NPB 100 taught by Professor Chapman during the Spring '08 term at UC Davis.

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sample_midterm_3_2006 - YOUR NAME_ Social Security #_ Your...

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