A) Calculate the osmolarity of the cell. 15 0s B) Calculate the osmolarity of th

Question

A) Calculate the osmolarity of the cell. 15 0s B) Calculate the osmolarity of the solution: 20 0sm C) The solution is SolutionA 15 mM NaCI 15 mM Urea to the cell. 15 mM Dextrose b) isoosmotic c) hyposomotic IMPORTANT NOTE: Osmolarity does not differentiate between penetrating solutes (can diffuse across a membrane) and non-penetrating solutes (cannot or does not diffuse across a membrane). In contrast, tonicity only takes into account non-penetrating solutes. 6) Name a non-penetrating solute to a human red blood cell 7) Provide a mechanical explanation for this paradox: Simple sugars can be a penetrating solute for human cells. 8) Urea and dextrose are both penetrating solutes. Examine the hypothetical cell in #5 again. Is the solution hypotonic, hypertonic, or isotonic? Briefly defend your answer

Explanation / Answer

6. NaCl

7. Simple sugars such as dextrose are used in medicine preparation. these solutions are iso osmotic but hypotonic.

8 The solution above is hypertonic as both urea and dextrose are penetrating and NaCl is non penetrating.

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