Diffusion, Osmosis and Active Transport

Question 1

What is a passive process?

Answer 1

A process that does not require energy

Question 2

Describe the process of diffusion.

Answer 2

The net movement of particles from an area of high concentration to low concentration

Question 3

Give the definition of osmosis.

Answer 3

• The net movement of water particles across a partially permeable membrane
• From an area of high to low water concentration

Question 4

What is the difference between dilute and concentrated solutions?

Answer 4

• Dilute solutions contain many water particles and few solute particles
• Concentrated solutions contain many solute particles and few water particles

Question 5

Describe the process of active transport.

Answer 5

• The movement of particles across a membrane against the concentration gradient
• Using energy transferred during respiration

Question 6

(Exam-style question)

Answer 6