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