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.
Credit card numbers are ISO 7812 numbers. As an ISO 7812 number it contains: 1  A single-digit major industry identifier (MII) (the MII is considered to be part of the issuer identifier number), a six-digit issuer identifier number (IIN), an account number, and a single digit checksum using the Luhn algorithm.