Diffusion, Osmosis and Active Transport Flashcards
(areas covered: diffusion, osmosis, active transport, the effect of osmosis on cells)
1
Q
What is a passive process?
A
A process that does not require energy
2
Q
Describe the process of diffusion.
A
The net movement of particles from an area of high concentration to low concentration
3
Q
Give the definition of osmosis.
A
- The net movement of water particles across a partially permeable membrane
- From an area of high to low water concentration
4
Q
What is the difference between dilute and concentrated solutions?
A
- Dilute solutions contain many water particles and few solute particles
- Concentrated solutions contain many solute particles and few water particles
5
Q
Describe the process of active transport.
A
- The movement of particles across a membrane against the concentration gradient
- Using energy transferred during respiration
6
Q
(Exam-style question)
A
