understand how the kidney carries out its roles of excretion and of osmoregulation
the tissue fluid must be isotonic with the cells cytoplasm. so the compostion of blood here must be controlled (the kidney does this)
if it was hypotonic there would be too much water, if it was hypertonic, there would be too little water
excess H(2)O + salts --> excreted down
the tissue fluid must be isotonic with the cells cytoplasm. so the compostion of blood here must be controlled (the kidney does this)
if it was hypotonic there would be too much water, if it was hypertonic, there would be too little water
excess H(2)O + salts --> excreted down
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