Osmosis and Active transport Flashcards
1
Q
What is osmosis?
A
Osmosis is the movement of water from a less concentrated solution to a more concentrated solution through a partially permeable membrane.
2
Q
What two factors are needed for osmosis to happen?
A
- Two solutions with different concentrations
- A partially permeable membrane to separate them
3
Q
Why is osmosis important for plants?
A
Osmosis is important to plants. They gain water by osmosis through their roots. Water moves into plant cells by osmosis, making them turgid or stiff so that they are able to hold the plant upright.
4
Q
What is Active transport?
A
Active transport is the process by which dissolved molecules move across a cell membrane from a lower to a higher concentration. In active transport, particles move against the concentration gradient - and therefore require an input of energy from the cell.
