Final answer:
The antidiuretic hormone (ADH), also known as vasopressin, is released by the pituitary gland and helps in the reabsorption of water in the kidneys, maintaining the body's water balance.Option 4 is the correct answer.
Step-by-step explanation:
The hormone that is released by the pituitary gland in the brain and increases the reabsorption of water by the kidneys when the blood becomes too concentrated is the antidiuretic hormone (ADH), also known as vasopressin. ADH is produced by the hypothalamus and stored in the posterior pituitary gland until it is released into the bloodstream. Upon release, ADH travels to the kidneys where it makes the collecting ducts more permeable to water, allowing more water to be reabsorbed into the blood and reducing urine volume. This is a vital mechanism for maintaining the body's water balance and blood pressure, especially in situations where dehydration or high osmolarity is detected by the hypothalamus.
Antidiuretic hormone (ADH), released by the hypothalamus and stored in the pituitary gland, regulates water balance. ADH enhances water reabsorption in kidneys, crucial for maintaining proper hydration and blood pressure, triggered by signals of dehydration or high osmolarity detected by the hypothalamus.