Function of adrenal cortex' hormone (mineralocorticoids)
$\rightarrow$ Increase blood levels of $Na^+$ and water
$\rightarrow$ Decrease in blood $K^+$ level
$\rightarrow$ Tubular reabsorption of $Na^+$
$\rightarrow$ Glycogenolysis

A destruction of adrenal cortex by diseases like tuberculosis produces addison disease due to the deficiency
of both glucocorticoids and mineralocorticoids. This condition is known as addison's syndrome and the
consequent symptoms.
Imbalance of $K^+$ leads to vomitting, nausea and diarrhoea.