BSCI 353 Lecture Notes - Lecture 8: Voltage Clamp
24 Sep 2016
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Meg is faster than pet, fmri and has better spatial localization than eeg (as fast as electrode) but still noisier so you have to average it. The batteries represent the equilibrium potential aka nernst the + in the 50mv refers to + on that battery outside cell = top inside cell = bottom. This is a complete circuit and current is flowing can the current go anywhere other than around the circuit? resistors r1 and r2: total resistance is 150 ohms (the sum) V are potential differences across the battery. 2 volts (sum of 2 1 v batteries) so ohm"s law, current i is 2/150 = 0. 0133 amps. 0. 33 v you can define the electrical potential of a point to be anything you like. Three resistor model two have variable resistors current tends to flow in through the resistor potassium current tends to flow out leakage current (potassium) is usually afflux as current flows across resistors.
