Explore
Learn: Diffusion, Osmosis, and Active Transport
WJEC GCSE in BIOLOGY specification
Ready to start this lesson?
Sign in to track your progress. 13 steps including 7 interactive questions.
Sign In to Start Learning
Students also studied
Browse allSteps in this lesson (13)
Welcome!Today we’ll explore how substances move in and out of cells: diffusion, osmosis, and active transport. These processes are vital for maintaining life in plants and animals.
What is Diffusion?Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. It happens down a concentration gradient and does not require energy. This is how gases like oxygen and carbon dioxide move in and out of cells.
Quick check: Which statement about diffusion is correct?
Start the lesson to answer this multiple choice question
What is Osmosis?Osmosis is the movement of water molecules across a selectively permeable membrane from an area of high water potential to an area of low water potential. It’s a type of diffusion, but it specifically involves water.
Osmosis is the movement of {{blank0}} molecules across a {{blank1}} membrane.
Start the lesson to answer this fill in the blank question
What is Active Transport?Active transport is the movement of substances against a concentration gradient, from low to high concentration. This process requires energy from respiration and is important for absorbing nutrients like minerals in plant roots.
Which process requires energy to move substances against a concentration gradient?
Start the lesson to answer this multiple choice question
Examples of Diffusion, Osmosis, and Active TransportLet’s look at how each process works in real life:
Match the items on the left with their correct pairs on the right
Start the lesson to answer this matching question
Review Time!Great work! We’ve covered diffusion, osmosis, and active transport. Let’s review what we’ve learned with a few questions.
Which of the following statements are true about diffusion and osmosis? (Select all that apply)
Start the lesson to answer this multi-select question
Match the items on the left with their correct pairs on the right
Start the lesson to answer this math equation question
Active transport requires {{blank0}} to move substances against a {{blank1}} gradient.
Start the lesson to answer this fill in the blank question
Want to Learn More?
Get personalised lessons, quizzes, and instant feedback from your AI tutor.
Explore More Topics