Describe the role of ADH in regulating the water content of the blood
ADH = anti-divretic hormone
produced at the region of the brain called hypothalamus
Like all hormones, it flows through the blood stream, and its target is the kidney
The effect of ADH is to control the water composition in blood. It has the ability to make the blood more or less concentrated. Tissue fluid is isotonic.
ADH actually targets the collecting duct. It allows more water to come out of the collecting duct.
Recall that water is selectively reabsorbed into the blood at collecting duct.
It is possible to absorb even more water back into the blood with the help of ADH. ADH creates more pores on the collecting duct, so more water can escape into the blood.
The consequence of ADH secretion is that the urine will be more concentrated and will have a lower volume.
Extension: How does our brain respond with ADH on the hot day? Cold Day? When we're dehydrated?
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