'Flakka': How dangerous is the new street drug? A designer street drug called 'Flakka' is making headlines again with a new incident involving four people going on a rampage in Sullivan, Missouri. What is Flakka and just how dangerous is it?
Voltage clamp. The voltage clamp is an experimental method used by electrophysiologists to measure the ion currents through the membranes of excitable cells, such as neurons, while holding the membrane voltage at a set level.
The voltage clamp is a current generator. Transmembrane voltage is recorded through a voltage electrode, relative to ground, and a current electrode passes current into the cell. The experimenter sets a holding voltage, or command potential, and the voltage clamp uses negative feedback to maintain the cell at this voltage.