Osmosis and Active Transport Flashcards
What is osmosis?
Osmosis is the net movement of water from a high to low concentration through a semi-permeable membrane
What is active transport?
The movement of particles against their concentration gradient from low to high concentration
How is active transport different to diffusion ?
It requires energy as it goes against the concentration gradient
What will happen if too much water moves into a cell ?
The cell could burst
What would happen if the solution is more concentrated with water on the outside than inside the cell?
The cell would shrivel and die
What are some examples of active transport?
In root hair cells - they take up mineral ions
Which there’s usually more of inside the cell than in the soil so it needs to go against the concentration gradient
In the gut- substances such as glucose and amino acids have to move from your gut into your blood stream
Sometimes there can be a lower concentration of sugar molecules in in the gut than blood meaning diffusion can not occur
Why is a cell wall important in osmosis?
If too much water moves into a cell it can stop it from bursting
What is it called when a cell is full of water and lost water?
When a cell is full of water it’s called turgid
When it’s lost water it’s flaccid
