The functions that both the nerve cells and muscle cells
have in common are the following;
-
Both cells are excitable
-
They both experience voltage difference in the
cell membrane
-
The cell membrane of both of cells has electrochemical
impulses
I think that the best phrase to fit into the blank is a "scientific theory".
A scientific theory is developed through experiments which use the scientific method, and a theory can be improved if additional data is available or if people provide suggestions which make the theory fit the data better.
Answer: This is called chlorine
Explanation: 18