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The sodium-calcium exchanger (often denoted Na + /Ca 2+ exchanger, exchange protein, or NCX) is an antiporter membrane protein that removes calcium from cells. It uses the energy that is stored in the electrochemical gradient of sodium (Na +) by allowing Na + to flow down its gradient across the plasma membrane in exchange for the countertransport of calcium ions (Ca 2+).
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Overdrawn at the Memory Bank is a 1984 science-fiction television film starring Raul Julia and Linda Griffiths (pictured).Based on a 1976 short story by John Varley from the Eight Worlds series, the film takes place in a dystopian future where an employee at a conglomerate, played by Julia, gets trapped inside the company's computer, where he is monitored and later abetted by a character ...
The contingent vote, also known as "top-two instant-runoff voting" ("top-two IRV"), is the same as instant-runoff voting, except that if no candidate achieves a majority in the first round of counting, all but the two candidates with the most votes are eliminated, and the second preferences for those ballots are counted. As in instant-runoff ...
The highest-rated individual game in World Series history was Game 6 in 1980, when the Philadelphia Phillies defeated the Kansas City Royals; the game had a 40.0 rating. [ 5 ] [ 6 ] The only other games with a rating of 39 or higher were Game 7 in 1975 , when the Cincinnati Reds defeated the Boston Red Sox , with a 39.6 rating, [ 5 ] and Game 4 ...
Most prokaryotes are the smallest of all organisms, ranging from 0.5 to 2.0 μm in diameter. [1] [page needed] A prokaryotic cell has three regions: Enclosing the cell is the cell envelope, generally consisting of a plasma membrane covered by a cell wall which, for some bacteria, may be further covered by a third layer called a capsule.
An asymmetric cell division produces two daughter cells with different cellular fates. This is in contrast to symmetric cell divisions which give rise to daughter cells of equivalent fates. Notably, stem cells divide asymmetrically to give rise to two distinct daughter cells: one copy of the original stem cell as well as a second daughter ...
Co-stimulation is a secondary signal which immune cells rely on to activate an immune response in the presence of an antigen-presenting cell. [1] In the case of T cells, two stimuli are required to fully activate their immune response.