Learning objective

Identify that certain substances enter and exit cells via diffusion through the cell membrane.

Read the explanation, check the common trap, then practise with flashcards and questions.

Practise this topic Read the exam answer Topic hub

Exam focus

Read the explanation.
Check key terms.
Practise with linked questions.

Cambridge IGCSE Combined ScienceMovement into and out of cellsCore content

Study support

Understand this objective

Quick explanation

Identify that certain substances enter and exit cells via diffusion through the cell membrane

This point belongs to Diffusion, especially Diffusion outcomes.
You need to be able to identify that certain substances enter and exit cells via diffusion through the cell membrane.
The key ideas to know are State.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

State

Why it matters

This objective helps connect Diffusion outcomes to exam-style questions, flashcards, and revision notes for Diffusion.

Revision tools

Choose how to practise

Back to topic hub

Flashcards10 linked cards

Flashcard 1 of 10

Press Space to flip, arrows to move

Practice Questions7 linked questions

Question 1 of 7

Choose an answer, get feedback, then move sideways through the set.

0 of 5 attempted

Paper 3 structured question: Diffusion

Paper 3Theory (Core)2 marks

Description

Diffusion Process

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. It occurs in liquids and gases and does not require energy.

a
Explain how diffusion helps cells maintain homeostasis.
Your answer
Aim for approximately 2 distinct marking points.
[2]

Revision notestopic notes

Open the full topic revision notes when you are ready to review this objective in context.

Open revision notes

Related learning objectives

Revision hubs

Move back to a broader study route

Cambridge IGCSE Combined Science resources