Configurations are described for utilizing light-activated proteins within cell membranes and subcellular regions to assist with medical treatment paradigms, such as hypertension treatment via anatomically specific and temporally precise modulation of renal plexus activity. The propellant fragments are recovered for subsequent treatment and the casings are deactivated before being scrapped. A control circuit controls potentials of the word lines and the bit lines in accordance with input data, and controls write, read and erase operations of data with respect to the memory cell. A manually operable mechanism rotates the first valve element in the first chamber and the second valve element in the second chamber. The electromagnetic actuator moves the shaft parallel with the axis from the first position to the second position so that the blocker is unlocked if the token has a valid access code. Additionally, the system may include a remote servicing system to maintain the apparatus.