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Questions and Answers
What is the primary characteristic of an isotonic solution?
What is the primary characteristic of an isotonic solution?
- It has a varying concentration of solutes.
- It has a lower concentration of solutes than the cell.
- It has the same concentration of solutes as the cell. (correct)
- It has a higher concentration of solutes than the cell.
What happens to cells in an isotonic solution?
What happens to cells in an isotonic solution?
- They undergo lysis.
- They neither shrink nor swell. (correct)
- They swell due to water gain.
- They shrink due to water loss.
What is the effect of an isotonic solution on the cell membrane?
What is the effect of an isotonic solution on the cell membrane?
- It remains intact. (correct)
- It breaks down.
- It becomes permeable.
- It becomes rigid.
What is a common use of isotonic solutions in medical treatments?
What is a common use of isotonic solutions in medical treatments?
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How does a 0.9% sodium chloride (NaCl) solution relate to human blood cells?
How does a 0.9% sodium chloride (NaCl) solution relate to human blood cells?
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What happens to cells in a hypotonic solution?
What happens to cells in a hypotonic solution?
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Study Notes
Isotonic Solutions
Definition
- An isotonic solution is a solution that has the same concentration of solutes as the cell.
- The concentration of solutes inside the cell is equal to the concentration of solutes outside the cell.
Characteristics
- The movement of water molecules into or out of the cell is minimal.
- The cell retains its original shape and size.
- There is no net movement of water into or out of the cell.
Example
- A 0.9% sodium chloride (NaCl) solution is isotonic with human blood cells.
Effects on Cells
- Cells in an isotonic solution will neither swell nor shrink.
- The cell membrane remains intact, and the cell functions normally.
- Isotonic solutions are often used in medical treatments, such as IV fluids and contact lens cleaning solutions, to maintain cell health and prevent damage.
Comparison to Other Solutions
- Isotonic solutions are different from hypotonic solutions, which have a lower concentration of solutes, and hypertonic solutions, which have a higher concentration of solutes.
- Cells in hypotonic solutions will swell, while cells in hypertonic solutions will shrink.
Isotonic Solutions
- An isotonic solution is a solution that has the same concentration of solutes as the cell.
- In an isotonic solution, the concentration of solutes inside the cell is equal to the concentration of solutes outside the cell.
Characteristics of Isotonic Solutions
- Minimal movement of water molecules into or out of the cell.
- Cell retains its original shape and size.
- No net movement of water into or out of the cell.
Example of an Isotonic Solution
- A 0.9% sodium chloride (NaCl) solution is isotonic with human blood cells.
Effects on Cells in Isotonic Solutions
- Cells neither swell nor shrink.
- Cell membrane remains intact, and the cell functions normally.
- Isotonic solutions are used in medical treatments to maintain cell health and prevent damage.
Comparison to Other Solutions
- Isotonic solutions differ from hypotonic solutions, which have a lower concentration of solutes.
- Isotonic solutions differ from hypertonic solutions, which have a higher concentration of solutes.
- Cells in hypotonic solutions will swell, while cells in hypertonic solutions will shrink.
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