Simplify the following text for a Grade 11 native English-speaking person.
Original: Electrophysiology ( from Greek , Ä `` lektron , `` amber '' ( see the etymology of `` electron '' ) ; , physis , `` nature , origin '' ; and , - logia ) is the study of the electrical properties of biological cells and tissues .
Simplified: Electrophysiology is the study of the electrical properties of biological cells and tissues .