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.
The tenant has secured it with a lease. My hands are tied. A rental agreement, by contrast, is a month-to-month agreement. At the end of each 30-day period, the landlord and tenant are both free to change the terms. The landlord can raise the rent, decide to offer the space to someone else or enact a âno-petâ policy.