Their problem was that both the membrane current l M and the membrane potential V M are also changing constantly during the action potential. Now if one of these variables could be held constant during the action potential (i.e., V M), measurement of l M would enable them to calculate g M at any instant.
The CMMi Easy button notes on Product Integration (PI) Process Area Product Integration (PI) is one of the core Engineering Process Areas within CMMi, this process is concerned with assembly of product components to build the finished software product.
The noun 'product' is a word for an article or substance that is  manufactured or refined for sale; the number or expression  resulting from the multiplication of two or morâ¦e numbers or  expressions; an idea as a product of the mind; a word for a thing.