Which of the following hormones regulates the ionic balance in the body?

The correct answer is Vasopressin.

Key Points

• Vasopressin, also known as antidiuretic hormone (ADH), is secreted by the posterior pituitary gland and plays a crucial role in maintaining the body's water and ionic balance.
• It regulates the reabsorption of water in the kidneys by increasing the permeability of the renal tubules, thus controlling the concentration of electrolytes in the blood.
• Vasopressin prevents dehydration and excessive loss of electrolytes through urine by reducing urine output.
• This hormone helps in maintaining blood pressure by constricting blood vessels when the body is dehydrated or experiencing low blood volume.
• Its secretion is triggered by high blood osmolarity, low blood volume, or low blood pressure.

Additional Information

• Electrolytes: These are minerals like sodium, potassium, and chloride that are essential for maintaining fluid balance, nerve signaling, and muscle function in the body.
• Kidney Function: Kidneys play a vital role in filtering waste products from the blood, maintaining electrolyte levels, and regulating blood pressure and water balance.
• Posterior Pituitary Gland: This gland is responsible for the storage and release of two hormones: vasopressin (ADH) and oxytocin.
• Blood Osmolarity: It refers to the concentration of solutes in the blood, which vasopressin helps regulate by controlling water reabsorption in the kidneys.
• Dehydration Effects: Without adequate vasopressin activity, dehydration can lead to electrolyte imbalances, low blood pressure, and kidney dysfunction.