Podcast
Questions and Answers
What happens to a cell placed in a hypertonic solution?
What happens to a cell placed in a hypertonic solution?
- The cell shrinks and may undergo crenation (correct)
- The cell ruptures immediately
- The cell gains water and swells
- The cell remains unchanged in size
Which term describes the appearance of cells that are losing water due to a hypertonic solution?
Which term describes the appearance of cells that are losing water due to a hypertonic solution?
- Swelling
- Lysis
- Crenation (correct)
- Isotonic
What is the characteristic of a hypotonic solution?
What is the characteristic of a hypotonic solution?
- It can cause cells to lose water and crenate.
- It has a lower concentration of nonpermeating solute than the cell. (correct)
- It exerts high osmotic pressure.
- It has a higher concentration of nonpermeating solute than the cell.
What is osmotic pressure primarily dependent on?
What is osmotic pressure primarily dependent on?
Which process involves the separation of solute particles based on size using a semipermeable membrane?
Which process involves the separation of solute particles based on size using a semipermeable membrane?
Flashcards
Osmotic Pressure
Osmotic Pressure
The tendency of a solution to gain water due to the concentration of solutes.
Hydrostatic Pressure
Hydrostatic Pressure
The pressure exerted by water due to gravity or its volume.
Isotonic Solution
Isotonic Solution
A solution with the same concentration of dissolved particles as the cell's interior.
Hypertonic Solution
Hypertonic Solution
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Crenation
Crenation
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Study Notes
Osmosis
- Osmotic pressure is the tendency of a solution to absorb water due to its solute concentration (osmolarity).
- Hydrostatic pressure is the pressure exerted by water from its volume or gravity.
- Isotonic solutions have the same non-penetrating solute concentration as a cell's cytosol. This results in no net water movement.
- Hypertonic solutions have a higher concentration of non-penetrating solutes than a cell. This causes water to leave the cell, leading to cell shrinkage (crenation). Crenation is characterized by a spiny or shriveled appearance of the cell.
- Hypotonic solutions have a lower concentration of non-penetrating solutes than a cell. This causes water to enter the cell, leading to cell swelling (possible lysis). Lysis is the rupturing of the cell due to excessive swelling.
Dialysis
- Dialysis is a passive process. It's the separation of different sized solute particles, utilized across a selectively permeable membrane.
- Semipermeable membranes allow only small solute particles to pass through.
- Hypertonic solutions have high osmotic pressure, high solute concentrations, and low free water.
False Statements (Chapter 6)
- False: Osmotic pressure is the tendency of a solution to gain water due to its osmolarity. Strictly speaking it is the pressure needed to prevent further water movement.
- False: Swelling is caused by hypotonic solutions; the lower solute concentration outside the cell draws water in, causing the cell to swell and possibly rupture.
- False: Crenation happens in a hypertonic solution. The higher solute concentration outside the cell draws water out, causing the cell to shrink.
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Description
Explore the concepts of osmosis and dialysis in this quiz. Understand the differences between isotonic, hypertonic, and hypotonic solutions, as well as the implications of osmotic and hydrostatic pressure. Test your knowledge on how these processes affect cells and their environments.
