# Why would a buffer be important to homeostasis?

Feb 10, 2017

Does not homeostasis entail $\text{stability in the face of change?}$

#### Explanation:

And as you know buffers work by preventing gross changes in $p H$. See here for an account of their action. Depending on the capacity of the buffer, $p H$ is restricted to a value tolerably CLOSE to the $p {K}_{a}$ of the acid.

The buffer equation tells you this:

$p H = p {K}_{a} + {\log}_{10} \left\{\frac{\left[{A}^{-}\right]}{\left[H A\right]}\right\}$

Changes in the concentration of acid or base are moderated by the logarithmic function.