Question

__________ tissues respond quickly to outside stimuli by means of changes in membrane potential.
excitabl
responsive
adipose
epithelial
connective

Explanation:

Excitable tissues like nerve and muscle can change their membrane potential in response to external stimuli. Responsive is a general - term; adipose is fat - tissue; epithelial forms coverings; connective supports and binds.

Answer:

A. Excitable