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Questions and Answers
What is the primary function of osmosis?
What is the primary function of osmosis?
- To facilitate the movement of solutes across a cell membrane
- To regulate the pH concentration of a solution
- To selectively move water across a semi-permeable membrane (correct)
- To allow all molecules to pass through a semi-permeable membrane
What type of solution has the same solute and pH concentration as the surrounding body fluid?
What type of solution has the same solute and pH concentration as the surrounding body fluid?
- Hypotonic
- Hypertonic
- Hyposaline
- Isotonic (correct)
What happens to a cell when it is placed in a hypotonic solution?
What happens to a cell when it is placed in a hypotonic solution?
- The cell increases in size, but does not rupture
- The cell shrinks due to water loss
- The cell remains the same size
- The cell ruptures due to excess water intake (correct)
What is the characteristic of a hypertonic solution?
What is the characteristic of a hypertonic solution?
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What is the effect of a hypertonic solution on a cell?
What is the effect of a hypertonic solution on a cell?
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Study Notes
Osmosis
- Osmosis is the movement of water across a semi-permeable membrane, selectively allowing only certain molecules to pass through.
- Water is usually the only free-flowing molecule across this membrane.
Types of Solutions
- Isotonic Solutions: have the same solute and pH concentration as the surrounding body fluid or cytoplasm.
- Hypotonic Solutions: contain a lesser amount of solute concentration compared to the surrounding fluid, causing cells to rupture due to excess water input.
- Hypertonic Solutions: contain a higher concentration of solute compared to the surrounding fluid, pushing water out of cells and causing them to shrink.
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