sample_midterm_2_2007

sample_midterm_2_2007 - NAME_ STUDENT ID#_ NPB100 Spring...

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NAME___________________________________ STUDENT ID#_______________________ 1 NPB100 Spring Quarter 2007 Midterm 2 Your signature______________________ Please check this box if you do not want your exam returned in the bins in the hallway… Question Score Total 1 18 2 21 3 12 4 18 5 4 6 10 7 9 8 8 TOTAL 100
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NAME___________________________________ STUDENT ID#_______________________ 2 Question 1. (Total: 18 points) A cell has sodium, potassium and chloride channels that are open at rest. The equilibrium potential for sodium is 0mV, the equilibrium potential for potassium is +35mV, and the equilibrium potential for chloride is -75mV. The cell’s resting membrane potential is -74mV. The threshold for firing action potentials is +12mV. 1a. (3 points) opening which channel(s) will cause changes in the membrane potential? 1b. (3 points) opening which channel(s) will cause hyperpolarizing potentials? 1c. (3 points) opening which channel(s) will cause excitatory potentials? 1d. (3 points) which ion(s) are found in greater concentration outside the cell than inside? 1e. (3 points) to which ion is the cell most permeable at rest? 1f. (3 points) Which type of voltage gated channel (sodium, potassium or chloride) could be used by this cell to initiate the rising phase of an action potentials? GO ON TO NEXT PAGE!
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NAME___________________________________ STUDENT ID#_______________________ 3 Question 2. (Total: 21 points) Epilepsy is a disease caused by neurons in the cortex releasing too much of the neurotransmitter glutamate. You isolate a channel
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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_2_2007 - NAME_ STUDENT ID#_ NPB100 Spring...

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