To avoid dehydration or overhydration, proper water balance must be maintained in the body. One way that the water concentration of the body is monitored is by osmoreceptors in the hypothalamus which detect the concentrations of ions in the extracellular fluid. When a change in the concentration of ions in the blood is detected, such as during exercise, the body must respond. To do so, the hypothalamus produces antidiuretic hormone (ADH), also known as vasopressin. ADH is then transported to and released from the pituitary gland, where it travels to several areas of the body including the kidneys. ADH functions to stimulate the insertion of ‘water channels’ called aquaporins into the membranes of the kidney tubules, allowing for greater water reabsorption.If a person were to experience over hydration, what would happen to the levels of ADH secreted from the pituitary gland and the permeability of water in the kidney tubule?
Question
To avoid dehydration or overhydration, proper water balance must be maintained in the body. One way that the water concentration of the body is monitored is by osmoreceptors in the hypothalamus which detect the concentrations of ions in the extracellular fluid. When a change in the concentration of ions in the blood is detected, such as during exercise, the body must respond. To do so, the hypothalamus produces antidiuretic hormone (ADH), also known as vasopressin. ADH is then transported to and released from the pituitary gland, where it travels to several areas of the body including the kidneys. ADH functions to stimulate the insertion of ‘water channels’ called aquaporins into the membranes of the kidney tubules, allowing for greater water reabsorption.If a person were to experience over hydration, what would happen to the levels of ADH secreted from the pituitary gland and the permeability of water in the kidney tubule?
Solution
In the case of overhydration, the body would have an excess of water, and the concentration of ions in the blood would be lower than normal. This would be detected by the osmoreceptors in the hypothalamus. As a response, the hypothalamus would decrease the production of ADH. With less ADH being released from the pituitary gland, there would be fewer signals for the kidneys to reabsorb water. This means that the permeability of the kidney tubules to water would decrease. As a result, less water would be reabsorbed by the kidneys and more would be excreted in the urine, helping to restore the proper balance of water and ions in the body.
Similar Questions
The human body monitors the amount of water in the blood. When there is too little water, a message is sent to the pituitary gland causing the release of antidiuretic hormone (ADH). ADH causes the kidneys to re-absorb water from the urine so that the blood water level returns to the normal range.This is an example of:
The pituitary releases a hormone called ADH when the hypothalamus senses that ion concentration is high in the blood. This often occurs when someone has not had enough water to drink. What is the target organ for the ADH?
What is the function of antidiuretic hormone (ADH)?Multiple choice question.It decreases release of oxytocin.It decreases water retention by the kidneys.It increases heart rate.It increases water retention by the kidneys.
Click and drag on elements in orderPlace the statements in the correct order to illustrate the role of antidiuretic hormone (ADH) in regulating extracellular volume.InstructionsDrag and drop application.Choice 1 of 5. Blood pressure and extracellular fluid volume decrease. toggle buttonBlood pressure and extracellular fluid volume decrease.Choice 2 of 5. Reabsorption of water in kidney tubules decreases toggle buttonReabsorption of water in kidney tubules decreasesChoice 3 of 5. Blood pressure greatly increases. toggle buttonBlood pressure greatly increases.Choice 4 of 5. ADH secretion is inhibited. toggle buttonADH secretion is inhibited.Choice 5 of 5. Urine volume increases. toggle buttonUrine volume increases.Need help? Review these concept resources.
ADH (antidiuretic hormone) is secreted by which nuclei of the hypothalamus?
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