BIPN Final fortes

BIPN Final fortes - Final exam BIPN 100 Winter 2008 1....

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Final exam BIPN 100 Winter 2008 1. Regarding to membrane equilibrium potential, A. Potassium has higher concentration outside the cell, B. Overall membrane potential is positive when no action potential present C. Both chemical and electrical potential contribute to the equilibrium potential D. The concentration gradient of Na ion is maintained by leak channel E. Both A and C 2. For cell electrochemical potential, A. The electrical potential equals to the natural log of [ion]in over [ion]out for Chlorine ion. B. Temperature is directly proportional to the potential C. Ionic charge is the charge of the ion, could be positive or negative, and has no effect on the potential. D. The equation has one constant, and it is the Faraday’s constant. E. Both B and D. 3. There are many ways for a particle to cross the plasma membrane, pick the right pair A. Sodium can cross by either active transport of Na/K pump, or leak channels. B. K can cross by meaning of only protein mediated transport powered by ATP. C. Water is the most basic element in body, so it can cross membrane freely down osmotic potential. D. Oxygen is transport from capillary to tissue by Oxygen/carbon dioxide antiporter. E. The fuel for most cells is Glucose and it can pass through the membrane since it is non-polar. 4. Active transport is one of the many ways body transport particles.
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A. Na/K ATPase pumps 2 Na ion outside the cell, and 3 K inside the cell. B. Na/K ATPase pumps 2 Na ion inside the cell, and 3 K outside the cell. C. Na/K ATPase pumps 3 Na ion outside the cell, and 2 K inside the cell. D. Na/K ATPase pumps 3 Na ion inside the cell, and 2 K outside the cell. E. None of the above. 5. What would happen if TEA (tetra ethyl ammonium), a poison that blocks K channel do to action potential and membrane resting potential? A. Cell will have a higher resting membrane potential. B. Vm will not return to the normal baseline due to less or none of the repolarization. C. Vm will not return to the normal baseline due to too much hyperpolarization. D. A and B. E. A and C. 6. During depolarization state of an action potential in a nerve cell, A. No opening of voltage-gated K channel. B. No opening of voltage-gated Na channel. C. No opening of Na/k leak channel D. No Na/K ATPase is working. E. Both A and C. 7. Which of the following will increase conduction velocity of a neuron? A. Increase the diameter of neuron B. Increase myelination C. Decrease the distance of the neuron D. Only A and C E. All of the above. 8. During a chemical synaptic transmission,
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A. Presynaptic terminal release epinephrine into the synaptic cleft B. When the AP reaches the Presynaptic terminal, voltage-gated Na channels are open. C. An example of this kind of transmission would be found at the
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BIPN Final fortes - Final exam BIPN 100 Winter 2008 1....

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