Action potential and Na+. It is a fact that Na+ ions cross the membrane and enter the cell during the rising phase of the action potential. The process happens because Na ions channels are open. Then the ions channels becomes inactivated/closed for a while. What happens to the Na+ ions that entered the cell?
Product (mathematics) In mathematics, a product is a number or a quantity obtained by multiplying two or more numbers together. For example: 4 Ã 7 = 28 Here, the number 28 is called the product of 4 and 7. The product of 6 and 4 will be 24, because 6 Ã 4 = 24.
Product Line Length. The product line length shows the number of different products in a product line. A long product line has lots of different products in it and a short product line has a small number of different products. The product manager's job is to work out how many products to include in the product line.roduct Line Depth. Some of the product types in a product line may be split again into groups, the product line depth shows how many subgroups the product line contains. For example Samsung have split their mobile phones into the following product lines touch screens, slider/folders, QWERTY keyboards and bar phones.