BILD2_Lect_2_21_12

BILD2_Lect_2_21_12 - Following depolarization, the neural...

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Following depolarization, the neural membrane potential is restored when A. Na+ ions rush outward through the membrane. B. K+ ions rush outward through the membrane. C. Cl- ions rush inward through the membrane. D. a pump moves ions to their original concentrations. E. the membrane becomes freely permeable to many ions. Which of the following statements about neurons is true? A. During the depolarization stage, the membrane potential becomes more negative. B. The length of the action potential depends on the strength of the stimulus. C. The height of the action potential peak depends on the strength of the stimulus. D. The refractory period dictates the directionality of action potential propagation. E. The longest neuron in the human body is roughly the length of two football fields. If you increased the Na+ concentration surrounding a resting neuron in a lab, what would happen to the membrane potential? A. It would decrease (become more positive). B. It would be unaffected. C. It would increase (become more negative). D. It would depend on the number of action potentials being generated. E. It might do something and it might not, but I am not in a position to say right now. Figure 49.UN03 Capillary Neuron Microglial cell Schwann cells Oligodendrocyte Astrocyte PNS CNS Cilia VENTRICLE Ependy- mal cell
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Figure 48.13 Axon Myelin sheath Schwann cell Nodes of Ranvier Node of Ranvier Layers of myelin Axon Schwann cell Nucleus of
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This note was uploaded on 04/05/2012 for the course BILD 2 taught by Professor Schroeder during the Winter '08 term at UCSD.

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BILD2_Lect_2_21_12 - Following depolarization, the neural...

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