Final answer:
When a blood cell is placed in an isotonic solution, it remains the same. In hypertonic solution, it shrinks. In hypotonic solution, it swells and may burst.
Step-by-step explanation:
When a blood cell is placed in an isotonic solution, which has the same concentration of solutes as the cytoplasm of the cell, it remains the same because there is no net movement of water in or out of the cell.
If a blood cell is placed in a hypertonic solution, which has a higher concentration of solutes than the cytoplasm of the cell, water will move out of the cell to the surrounding solution causing the cell to shrink.
In a hypotonic solution, which has a lower concentration of solutes than the cytoplasm of the cell, water will move into the cell causing it to swell and potentially burst in a process called lysis.
Learn more about Blood cell behavior in different solutions