A flaccid cell is a cell which is not plasmolysed or swollen. The plasma membrane of such cells are not tightly pressed against the cell wall. Molarity refers to the concentration of the solution in terms of number of moles of solute per liter of solution. if the initial molar concentration of the cytoplasm of a plant cell is 1.3M and the solution surrounding the cell has a concentration of .3M. If the plant cell is initially flaccid, the molarity of the cell's cytoplasm will decrease.
An action potential is defined as a sudden, fast, transitory, and propagating change of the resting membrane potential. Only neurons and muscle cells are capable of generating an action potential; that property is called the excitability.
