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Chapter 3 (Electricity (Current (I) measured in amperes: direction of…
Chapter 3
Electricity
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Electrical Conductance (g) measured in siemens: relative ability of a charge to move from one point to another
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Membrane Proteins
Ion Channels
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Gated Channels- opened/closed in response to changes in NTs, voltage, mechanical forces
Ion Pumps
Na+/K+ ATPase- 3 Na out, 2 K in
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Driving Force: Vm- Eion - difference between actual membrane potential and Nernst potential for an ion
Negative Driving Force- wants to make cell more positive (positive ions move in and negative ions move out)
Positive Driving Force- wants to make cell more negative (positive ions move out and negative ions move in)
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