QUESTION 20 The interstitial fluid surrounding the proximal tubules becomes very
ID: 3521739 • Letter: Q
Question
QUESTION 20 The interstitial fluid surrounding the proximal tubules becomes very salty, with a high osmolality due to O A. Nat and water exchanging across the epithelium, with water moving into the interstitial fluid and Na moving into the tubules. ??. CI moving across the epithelium into the interstitial fluid, Nat follows Cl into the interstitial fluid. This potential difference moves water from the interstitial fluid into the tubules Nat entering the cells from the filtrate in the lumen and moving into the surrounding interstitial fluid. This creates a potential difference that draws CI from the filtrate, through the epithelium, and into the interstitial fluid. Water moving by osmosis into the surrounding interstitial fluid drawing Nat out of the filtrate in the lumen into the interstitial C. O D fluid.Explanation / Answer
The intestinal fluid surrounding the proximal tubules becomes very salty ,with high osmolarity due to Na+ and water exchinging across the epithelium , with water moving into the intestinal fluid and Na+ moving into the tublues.
PROXIMAL CONVOLUTED TUBULE
proximal tubules is the coiled portion arising from bowmans capsule. It is situated near the cortex.
the proximal convoluted tubules is formed by single layer of cuboidal epithelial cells . characteristic feature of these cells is the presence of hair like projections directed towards the lumen to tubules , because of the presence of these projections , the epithelial cells are callled as brush bordered cells.
Substances reabsorbed from proximal tubules are glucose , amino acids , sodium, potassium, calcium, bicarbonates , urea , uric acid and water.