Multiple Choice
Which intravenous (IV) fluid is a hypertonic solution relative to blood plasma?
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14. Solutions
Osmosis
Multiple Choice
Which situation is an example of an isotonic solution with respect to a human red blood cell?
A
A red blood cell placed in pure water swells and may lyse.
B
A red blood cell placed in () shrinks.
C
A red blood cell placed in () swells.
D
A red blood cell placed in () shows no net change in size.
Verified step by step guidance1
Understand that an isotonic solution has the same solute concentration as the inside of the red blood cell, resulting in no net movement of water across the cell membrane.
Recognize that pure water is hypotonic relative to the red blood cell, causing water to enter the cell, making it swell and possibly lyse.
Identify that a 3.0% NaCl solution is hypertonic compared to the red blood cell, causing water to leave the cell, making it shrink.
Note that a 0.10% NaCl solution is also hypotonic, causing the cell to swell due to water entering the cell.
Conclude that a 0.90% NaCl solution is isotonic to human red blood cells, so the cell shows no net change in size because the solute concentration inside and outside the cell is balanced.
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