Lect+2 - QuickTime and a TIFF (Uncompressed) decompressor...

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Unformatted text preview: QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. A Ne uron at Re st Fig 2.9 Resting potential More negatively charged ions inside versus outside Due to uneven distribution of ions (Na+, K+, Cl-, Ca++, P-) Force that I nflue I on Move e s nce m nt Gradients Concentration Electrostatic QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. QuickTime a and TIFF (Uncompressed) decompressor are needed to see this picture. What causes the uneven distribution of ions? Fig 2.10 Local Pote ntials Different Stimuli can open ion channels briefly, causing local, small changes in ion distribution which results in small electrical changes IPSP EPSP Fig. 2.11 Fig. 2.11 Fig. 2.12 Action Potential Fundamental signaling unit within neuron's AXON Massive, FAST (50meters/sec) depolarization Active; excited; "firing" Voltage-gated channels Action Potential Threshold of Excitation All-or-none Voltage-sensitive channels Refractory Period Fig. 2.13 Saltatory Conduction Fig. 2.14 ...
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This note was uploaded on 04/03/2008 for the course BIO SCI 36 taught by Professor Dickson-anson during the Winter '08 term at UC Irvine.

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Lect+2 - QuickTime and a TIFF (Uncompressed) decompressor...

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