A single layer of cube-like cells that carry out active transport, facilitated diffusion, or secretion. They are found in mitochondria and kidneys. They often have cilia and microvilli on the surface.
credit definition The ability to obtain goods, money, or services in return for a promise to pay at some later date. The New Dictionary of Cultural Literacy, Third Edition
A credit line is the amount of money that can be charged to a credit card account. The size of a credit line, and how much of it has been borrowed, have a large influence on consumer credit scores. Low credit utilization -- that is, a credit line on which little has been borrowed -- leads to a higher credit score.