- Anti-diuretic hormone is produced in a region of the brain known as the hypothalamus. Like all hormones it flows through the blood stream and the target is the kidney.
- The effect of ADH is to control and alter the composition of water which is in blood.
- ADH has the ability to make blood more or less concentrated to keep the tissue fluid isotonic.
- This is the role of ADH.
- ADH targets the collecting duct and the effect of ADH is that it allows more water to come out of the collecting duct
- We know that water selective reabsorption happens in the collecting duct but ADH can increase the amount of water going into the blood.
- ADH makes the collecting duct walls more porous so that more water can escape from the collecting duct and this water goes back to the blood.
- The consequence of ADH secretion is that the urine would be more concentrated and have a lower volume.
Thursday, 3 November 2011
Describe the role of ADH (antidiuretic hormone) in regulating the water content of the blood.