The methods can be used to monitor the effects of {HEAD ~ added external agents} on {TAIL ~ cellular membrane potential} 
on
The methods can be used to monitor the effects of { HEAD ~ added external agents } on { TAIL ~ cellular membrane potential }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL