Cell transport Flashcards
What is diffusion?
The movement of particles from high concentrations to low concentrations
What is osmosis?
The movement of water particles from high concentrations to low concentrations through a permeable membrane.
What is active transport?
The movement of particles from low concentrations to high concentrations through a permeable membrane. This uses energy and transport proteins.
What is hypertonic?
The solution has a higher concentration of sugar/salt than the cell (think lots of sugar makes you hyper if that helps). Water will move out of the cell.
What is hypotonic?
The solution has a lower concentration of sugar/salt than the cell (think hippos live in water and there is a higher water concentration outside the cell). Water will move into the cell.
What is isotonic?
The solution has the same concentration of sugar/salt than the cell.
How are the lungs adapted for gas exchange?
They have a large surface area, they are one cell thick, they have a large blood supply
How are root hair cells adapted for gas exchange?
They have a large surface area, they have lots of mitochondria to release energy.
What do I mean by a flacid cell?
The water movement is equal in and out.
What do I mean by a turgid cell?
The water movement into the cell is greater than out. The cell looks swollen.
What do I mean by a plasmolised cell.
The water movement out is greater than in and the cell membrane breaks away from the cell wall.
How will water particles move if a cell is in a hypertonic solution?
They will move out of the cell.
How will the water particles move if a cell is hypotonic solution?
They will move into the cell.
What will happen to the mass of cells if water moves into them?
It will increase
What will happen to the mass of cells if water moves out of them?
It will decrease
