Osmosis and Tonicity – Transport Across Cell Membranes
About the Lecture
The lecture Osmosis and Tonicity – Transport Across Cell Membranes by Georgina Cornwall, PhD is from the course Cellular Structure.
Included Quiz Questions
What would happen to red blood cells if the plasma becomes hypertonic, secondary to extreme dehydration?
- Osmotic pressure would pull water out of the cells and they may shrivel.
- Osmotic pressure would draw water into the cells and they may lyse.
- No changes
- Red blood cells would expend energy to maintain their shape and function.
- The life span of cells would be shortened by half.
Which of the following best describes the mechanism of osmosis?
- Water molecules move across a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.
- Amphiphilic molecules move across a semipermeable membrane from a region of normal solute concentration to a region of lower concentration.
- Hydrophobic molecules move across a semipermeable membrane from a region of lower concentration to a region of higher concentration.
- Water molecules move across a semipermeable membrane from a region of lower concentration to a region of higher concentration.
- Hydrophilic molecules move across a permeable membrane from a region of higher solute concentration to a region of lower solute concentration.
What is the driving force of osmosis?
- Osmotic pressure
- Atmospheric pressure
- Absolute pressure
- Vacuum pressure
- Gauge pressure
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Author of lecture Osmosis and Tonicity – Transport Across Cell Membranes
Georgina Cornwall, PhD
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The pictures really help to understand these processes. Material about physics is usually boring for me but this time is was not so
not very engaging with the viewer, and it could be even more dynamic
