# Magnesium in Biology - Function

Function

A balance of magnesium is vital to the well being of all organisms. Magnesium is a relatively abundant ion in the lithosphere and is highly bioavailable in the hydrosphere. This availability, in combination with a useful and very unusual chemistry, may have led to its usefulness in evolution as an ion for signaling, enzyme activation and catalysis. However, the unusual nature of ionic magnesium has also led to a major challenge in the use of the ion in biological systems. Biological membranes are impermeable to magnesium (and other ions) so transport proteins must facilitate the flow of magnesium, both into and out of cells and intracellular compartments.

### Other articles related to "functions, function":

Formal Definitions - Lebesgue Integral
... For instance, a sequence of functions can frequently be constructed that approximate, in a suitable sense, the solution to a problem ... Then the integral of the solution function should be the limit of the integrals of the approximations ... However, many functions that can be obtained as limits are not Riemann integrable, and so such limit theorems do not hold with the Riemann integral ...
Integral - Extensions - Multiple Integration
... In general, an integral over a set E of a function f is written Here x need not be a real number, but can be another suitable quantity, for instance, a vector in R3 ... Just as the definite integral of a positive function of one variable represents the area of the region between the graph of the function and the x-axis, the double integral ... The same volume can be obtained via the triple integral — the integral of a function in three variables — of the constant function f(x, y, z) = 1 over the ...
Integral - Fundamental Theorem of Calculus
... is the statement that differentiation and integration are inverse operations if a continuous function is first integrated and then differentiated, the original function is retrieved ... integrals by using an antiderivative of the function to be integrated ...

### Famous quotes containing the word function:

“... The state’s one function is to give.
The bud must bloom till blowsy blown
Its petals loosen and are strown;
And that’s a fate it can’t evade
Unless ‘twould rather wilt than fade.”
Robert Frost (1874–1963)

Our father has an even more important function than modeling manhood for us. He is also the authority to let us relax the requirements of the masculine model: if our father accepts us, then that declares us masculine enough to join the company of men. We, in effect, have our diploma in masculinity and can go on to develop other skills.
Frank Pittman (20th century)

The more books we read, the clearer it becomes that the true function of a writer is to produce a masterpiece and that no other task is of any consequence.
Cyril Connolly (1903–1974)