Yr9 Biology-Cell Transport Flashcards
Define diffusion
The movement of particles from an area of high concentration to an area of low concentration producing an even spread in liquids and gases.
What is the difference in concentration?
Concentration Gradient
Name an example of diffusion in animals?
The alveoli in the lungs taking CO2 out of the blood and putting O2 into it.
Name an example of diffusion in plants?
The movement of oxygen and Carbon Dioxide in and out of a leaf during photosynthesis.
How does temperature effect the rate of diffusion?
The hotter it is the quicker it is.
What is osmosis?
The movement of water from an area of high concentration to an area of low concentration through a semi-permeable membrane.
What is a hypertonic solution?
A solution where there is a lower concentration of water outside the cell.
What happens to a cell when is shrinks through osmosis?
It becomes plasmolyzed.
What is an isotonic solution?
A solution where there in the same concentration of water inside the cell as there is outside the cell.
What happens to a cell when it doesn’t change through osmosis?
It becomes flaccid.
What is a hypotonic solution?
A solution where there is a higher concentration of water outside the cell.
What happens to a cell when is grows through osmosis?
It becomes turgid.
Define active transport.
The movement of particles from an area of low concentration to an area of high concentration.
Where is active transport used in animals?
In the small intestine the villi use carrier proteins to grab remaining particles of glucose from inside the intestine.
Where is active transport used in plants?
In the root hair cells it uses energy to extract remaining minerals from the ground.
