involves dialysis machine, blood leaves patients artery and into dialysis machine, where it flows between partially permeable dialysis membranes (that mimic basement membrane, impermeable to blood cells and LPP) and outside membranes are dialysis fluid (which is countercuurent to blood flow to maintain steep conc gradient, contains normal plasma levels of gluocse, sugars, mineral ions (for electrolyte balance) and all useful substances, so only XS removed, and has no urea so all urea diffuses out) everything passive (down conc gradients)

Dialysis blood machine membranes conc urea haemodyalsis involves - OCR A Biology

Hemodialysis involves a dialysis machine where blood leaves the patient's artery and flows into the machine. Inside, it passes between partially permeable dialysis membranes that mimic the basement membrane, which are impermeable to blood cells and large proteins. Dialysis fluid flows outside these membranes, counter-current to the blood flow to maintain a steep concentration gradient. This fluid contains normal plasma levels of glucose, sugars, mineral ions, and all useful substances, ensuring only excess substances are removed. It lacks urea, allowing all urea to diffuse out. The entire process is passive, relying on diffusion down concentration gradients.

Hemodialýza zahrnuje dialyzační přístroj, krev opouští tepnu pacienta a vstupuje do přístroje, kde protéká mezi částečně propustnými membránami. Tyto membrány napodobují bazální membránu a jsou nepropustné pro krevní buňky a velké proteiny, zatímco mimo membrány je dialyzační tekutina. Tato tekutina proudí protisměrně ke krevnímu toku, aby se udržel vysoký koncentrační gradient, a obsahuje normální hladiny glukózy, cukrů, minerálních iontů a všech užitečných látek. Tímto způsobem se odstraňují pouze přebytečné látky a díky absenci močoviny se močovinaDiffusionem kompletně odstraní. Vše probíhá pasivně na základě koncentračních gradientů.

Front	Haemodyalsis
Back	involves dialysis machine, blood leaves patients artery and into dialysis machine, where it flows between partially permeable dialysis membranes (that mimic basement membrane, impermeable to blood cells and LPP) and outside membranes are dialysis fluid (which is countercuurent to blood flow to maintain steep conc gradient, contains normal plasma levels of gluocse, sugars, mineral ions (for electrolyte balance) and all useful substances, so only XS removed, and has no urea so all urea diffuses out) everything passive (down conc gradients)

Front

Haemodyalsis

Back

involves dialysis machine, blood leaves patients artery and into dialysis machine, where it flows between partially permeable dialysis membranes (that mimic basement membrane, impermeable to blood cells and LPP) and outside membranes are dialysis fluid (which is countercuurent to blood flow to maintain steep conc gradient, contains normal plasma levels of gluocse, sugars, mineral ions (for electrolyte balance) and all useful substances, so only XS removed, and has no urea so all urea diffuses out)
everything passive (down conc gradients)

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Dialysis Blood Machine Membranes Conc Urea Haemodyalsis Involves