Question

Assertion :In dialyzer, the plasma proteins of the blood cannot be filtered, but molecules like urea, uric acid, creatinine and ions can be filtered. Reason: The cellophane membrane, used in the dialyzer is permeable to micromolecules, but impermeable to macromolecules.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

In the patients of renal failures and uremia, blood is dialysed in artificial kidneys. This eliminates small non-electrolyte waste products such as urea, uric acid, creatinine and the excess of electrolyte ions such as K${}^{+}$ and SO${}_4$${}^2$${}^{-}$ but retains plasma proteins and blood cells in the blood. The artificial kidney consists of many minute channels bounded by thin cellophane membranes, impermeable to colloidal plasma proteins but permeable to small molecules and ions. So, the correct option is A.