What is the significance of the porous nature of the cellophane membrane?(a) It does not allow the movement of molecules(b) It does not allow the movement of water(c) It allows the molecules based on their concentration gradient(d) It allows only water moleculesI had been asked this question in examination.I'd like to ask this question from Disorders in Excretory System topic in section Excretory Products and Elimination of Biology – Class 11

What is the significance of the porous nature of the cellophane membra

1.	What is the significance of the porous nature of the cellophane membrane?(a) It does not allow the movement of molecules(b) It does not allow the movement of water(c) It allows the molecules based on their concentration gradient(d) It allows only water moleculesI had been asked this question in examination.I'd like to ask this question from Disorders in Excretory System topic in section Excretory Products and Elimination of Biology – Class 11
Answer» Right OPTION is (c) It allows the molecules based on their concentration gradient To EXPLAIN I WOULD say: The porous MEMBRANE of the cellophane tube of the dialysing unit allows the passage or movement of molecules, based on their concentration gradient. As NITROGENOUS wastes are not present in the dialysing fluid, therefore these wastes passively move out from our blood and hence filtering it.

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