State true or false. Crenation of red blood cells results when the red blood cells lose water into a fluid environment that contains more solutes than the cell.

Answer

**Step-by-Step Solution:**

1. **Understanding Crenation**: Crenation refers to the process where red blood cells (RBCs) shrink or shrivel due to loss of water. This typically occurs when RBCs are placed in a solution with a higher concentration of solutes compared to the inside of the cell.

2. **Identifying the Solution Type**: The solution that causes crenation is known as a hypertonic solution. In a hypertonic solution, the concentration of solutes outside the cell is greater than that inside the cell.

3. **Mechanism of Water Movement**: When RBCs are placed in a hypertonic solution, water moves out of the cells into the surrounding fluid in an attempt to balance the solute concentrations on both sides of the cell membrane. This loss of water leads to the shrinking or crenation of the cells.

4. **Evaluating the Statement**: The statement in the question claims that crenation results when red blood cells lose water into a fluid environment that contains more solutes than the cell. This aligns perfectly with the definition and process of crenation.

5. **Conclusion**: Since the statement accurately describes the process of crenation, we can conclude that the statement is true.

**Final Answer**: True.

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