2. edema interstitial fluid 1 fluid in the body cavities m hydrops fluid in the cells t cellular edema (1) pathogenesis D)imbalance of exchange between intra-and extra body fluid (retention of water and sodium) basic mechanism: glomerular-tubular imbalance ①GFR↓ acute glomerulonephritis heart failure 2 reabsorption of proximal tubule f sympathetic nerve a filtration fraction t ANPI- reabsorption of water and sodium t2. Edema interstitial fluid fluid in the body cavities hydrops fluid in the cells cellular edema (1) pathogenesis 1)imbalance of exchange between intra- and extra￾body fluid (retention of water and sodium) basic mechanism: glomerular-tubular imbalance ① GFR acute glomerulonephritis heart failure ② reabsorption of proximal tubule sympathetic nerve filtration fraction ANP reabsorption of water and sodium