A solution with the same osmotic pressure as the blood is

• A. isotonic to the blood
• B. hypotonic to the blood
• C. hypertonic to the blood
• D. nontonic to the blood.

Answer: (A)

Verified step by step guidance

1. Understand the concept of osmotic pressure: Osmotic pressure is the pressure required to prevent the flow of a solvent into a solution through a semipermeable membrane. It is a colligative property, meaning it depends on the number of solute particles in a solution.
2. Define isotonic solutions: An isotonic solution has the same osmotic pressure as another solution, typically referring to biological contexts like blood. This means that the concentration of solute particles is equal on both sides of a semipermeable membrane, preventing net movement of water.
3. Compare with hypotonic and hypertonic solutions: A hypotonic solution has a lower osmotic pressure than the blood, leading to water moving into the blood cells. A hypertonic solution has a higher osmotic pressure, causing water to move out of the blood cells.
4. Identify the correct term: Since the problem states that the solution has the same osmotic pressure as the blood, it matches the definition of an isotonic solution.
5. Conclude with the correct choice: The solution is isotonic to the blood, as it has the same osmotic pressure, preventing any net movement of water across the cell membranes.