Which of the following statements about aldosterone is NOT correct?

• Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule.
• Aldosterone is stimulated by decreased plasma sodium levels and increased plasma potassium levels.
• Aldosterone is produced in the adrenal cortex.
• Aldosterone increases the number of passive sodium channels in the luminal membrane of the distal tubule and collecting duct, thus aiding sodium reabsorption.