Which laboratory value may indicate hyperfunction of the adrenal gland in a client?

In the context of adrenal gland function, a low potassium level, such as 2.9 mEq/L, is significant as it can indicate hyperaldosteronism, which is a condition characterized by excessive production of aldosterone from the adrenal glands. Aldosterone is a mineralocorticoid hormone that promotes sodium retention and potassium excretion in the kidneys. When the adrenal glands are hyperactive and produce too much aldosterone, it leads to an increased secretion of potassium, resulting in hypokalemia (low potassium levels).

A potassium level of 2.9 mEq/L is considered very low, and such hypokalemia can cause a range of symptoms, including muscle weakness, cramps, and cardiac arrhythmias. Therefore, this laboratory value points towards adrenal gland hyperfunction, as opposed to the other options which reflect values that do not have the same direct implications for adrenal function.

For instance, a sodium level of 143 mEq/L is within normal limits and does not indicate hyperfunction of the adrenal gland. Bicarbonate at 25 mEq/L also falls within the normal range, and total calcium at 10 mg/dL is typically considered normal. Understanding these values helps to establish a clear link between potassium levels