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.
An oral agreement is made between the landlord and. tenant after they discuss rental items. It is usually a. month to month agreementâthat is, the rent is paid on. a monthly basis and the lease continues without a inal. date until the landlord or the tenant ends it. An oral. lease, like a written lease, must be followed by both par.