Question

$N{a}^{+}$ secreting from the kidney are highly affected by the hormone

• A. Cortisol
• B. ADH
• C. Aldosteron
• D. Progesteron

Answer 1

The correct option is C Aldosteron

ADH lowers the osmolarity (reducing sodium concentration) by increasing water reabsorption in the kidneys. To prevent osmolarity from decreasing below normal, the kidneys have a regulated mechanism for reabsorbing sodium in the distal nephron. This mechanism is controlled by aldosterone, a steroid hormone produced by the adrenal cortex. When the osmolarity increases above normal, aldosterone secretion is inhibited. The lack of aldosterone causes less sodium to be reabsorbed in the distal tubule.