Question

aldosterone effect
aldosterone regulates
blood calcium ion levels
blood glucose levels
blood iodide ion levels
extracellular sodium and potassium ion levels

Explanation:

Aldosterone is a hormone that acts on the kidneys. Its main function is to regulate the reabsorption of sodium ions ($\text{Na}^+$) and the secretion of potassium ions ($\text{K}^+$). By doing so, it helps maintain the extracellular sodium and potassium ion levels, which is crucial for proper fluid balance, blood pressure regulation, and nerve and muscle function.

Answer:

extracellular sodium and potassium ion levels