What kind of tissues generate electrical signals?

Answer 1

The types of tissue that generate electrical signals would have to be examined on a case-by-case basis. There are a number of creatures that are bioluminescent, that generate light (which is electromagnetic radiation). And there are electric eels and electric catfish that generate a "pulse" of electrical energy. Additionally, many organisms have nervous systems that generate electrical signals as part of their nerve function. The variety of tissues that generate electrical signals varies widely depending on what kind of electricity or electrical signal is being generated. These tissues can generally be studied only individually, as the mechanism of electrical generation by one may be significantly different than that of another.