How the kidney carries out its roles of Osmoregulation
- The tissue layers surrounding each cell must be isotonic with the cytoplasm of the cells. This means that the amount of water going into and out of the cell is equal and the cells will remain the same size shape and function.
- The danger to the tissue is the blood circulating into the tissue would be concentrated - causing a hypertonic tissue fluid.
- It could also be very dilute causing a hypotonic tissue fluid.
- Both hypertonic and hypotonic tissue fluids are undesirable - Hypertonic removes too much water
- Hypotonic adds too much water
- The tissue fluid is Isotonic to the cell cytoplasm by controlling the composition of blood - blood controls the tissue fluid.
- It is the job of the kidney to control the composition of our blood.
By controlling the content of water and salts in the blood, the kidney can keep the blood and therefore the tissue fluid Isotonic with the cells cytoplasm, maintaining the function of the cells.
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