calcium pump. the mechanism of active transport of calcium (Ca 2+) across a membrane, as of the sarcoplasmic reticulum of muscle cells, against a concentration gradient; the mechanism is driven by hydrolysis of ATP.
A rental agreement differs from a lease agreement in that it is not a long-term contract and usually occurs on a month-to-month basis. This month-to-month lease agreement expires and then renews each month upon agreement of the parties involved.
A Rental Agreement (lease) is a contract between a landlord and tenant that is used to set out the terms of a residential tenancy. A lease can be used when renting a room, house, apartment, condo, basement suite, duplex, or town home.