Anti diuretic hormone - ADH
Produced in the hypothalamus
- Flows to the bloodstream
- Target is the kidney
Effect of ADH
- Control and alter the quantity of water in the blood
- Ability to make the blood more or less concentrated
- Tissue fluid needs to be isotonic with the cytoplasm of the cell
ADH targets the collecting duct
- Allows more water to come out of the collecting duct
- Collecting duct ===selective reabsorption===> Blood
- ADH makes collecting duct walls more porous
- Water goes back into the blood
Consequence of ADH secretion
- Urine more concentrated
- Lower volume
ADH response to hot days, cold days, dehydration
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