Week1DiscQuestions-W11 (1)

Week1DiscQuestions-W11 (1) - What happens if you then add...

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Study Questions - Week 1 1. Diagram a neuron and label its components. In what ways are neurons specialized for communication? Do these specializations distinguish neurons from other types of cells? 2. What controversy were Golgi and Cajal involved in? 3. What are the main types of glial cells, and what is the main function of each? If the brain has more glia than neurons, why do neurons get so much more attention? 4. Draw the basic experimental setup for recording membrane potentials. 5. Suppose a water-filled aquarium is divided into two compartments by a membrane that is not permeable to any ions. Add KCl to one side. What happens? Will there be a potential difference develop between the two sides? What would happen to the membrane potential if K-selective channels are added to the membrane (assume the channels are in the open state)?
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Unformatted text preview: What happens if you then add NaCl to one side only? 6. Explain the meaning of hyperpolarization vs. depolarization. 7. Distinguish between permeability and conductance. 8. What is meant by electrochemical equilibrium? 9. Write the Nernst equation. Explain how it can be used to determine the equilibrium potential for K + . What good is it to know the K + equilibrium potential? Predict the potassium equilibrium potential under the following conditions: [K + ] o = 100 mM, [K + ] i = 5. R = 8.3 coulomb volts/deg mole; T = 298 K, F=96,500 coul/mol. 10. Name 3 types of ion channels, distinguished by their mode of activation. 11. Describe a condition in which ions move through ion channels against their concentration gradient. 12. What is “driving force” for movement of ions through a channel?...
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