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Which of the solutions below is hyperosmotic, isoosmotic, and hypoosmotic relative to the Red Blood Cells...

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Biology

Which of the solutions below is hyperosmotic, isoosmotic, andhypoosmotic relative to the Red Blood Cells (RBCs) BEFORE and AFTERblood is added?

0.15 M Urea

Before:

After:

What is the osmolarity before and after blood is added?

0.3 M NaCl + 0.3 M Urea

Answer & Explanation Solved by verified expert
3.9 Ratings (591 Votes)
First part Before adding blood 015M urea is isoosmotic as urea can penetrate cell membrane When red blood cells are placed in a 015 M urea solution the urea permeable solute diffuses into the cells until its concentration on both sides of the cell membranes becomes equal Quickly as the solute can not pass out of the cell osmotically    See Answer
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