A Level Biology Revision Lesson 64: Factors Affecting the Rate of Simple & Facilitated Diffusion.

Task 1. Check Where this Lesson fits into your Exam Specification!

Task 2. Watch the Revision Notes Lesson in Full.

Download the accompanying revision notes (A3 PDF)

64.-Factors-Affecting-the-rate-of-simple
 

Check Your Spec!

★ AQA Specification Reference: - 3.2.3 Transport across cell membranes. Movement across membranes occurs by: Students should be able to  explain the adaptations of specialised cells in relation to the rate of transport across their internal and external membranes. Explain how surface area, number of channel or carrier proteins and differences in gradients of concentration or water potential affect the rate of movement across cell membranes.

 

★ CIE Specification Reference: - 4 Cell membranes and transport. 4.2 Movement of substances into and out of cells: a) describe and explain the processes of Facilitated diffusion. 

Explain Factors affecting the rate of diffusion.

 

★ Edexcel (Biology A – Salters-Nuffield) Specification Reference: - Topic 2: Genes and Health: 2.4 i) Understand what is meant by passive transport (diffusion and Facilitated diffusion.). Explain Factors affecting the rate of diffusion.

 

★ Edexcel (Biology B) Specification Reference: - Topic 4: Exchange and Transport. 4.2 Cell transport mechanisms: ii Understand how passive transport is brought about by Diffusion and Facilitated diffusion. Explain Factors affecting the rate of diffusion.

 

★ OCR (Biology A) Specification Reference: - Module 2: Foundations in biology: 2.1.5 Biological membranes. (d) (i) the movement of molecules across membranes: To include diffusion and facilitated diffusion as passive methods. Explain Factors affecting the rate of diffusion.

 

★ OCR (Biology B) Specification Reference: - Module 2: Cells, chemicals for life, transport and gas exchange. (I) the movement of molecules across plasma membranes. To include diffusion and facilitated diffusion as passive methods of transport across membranes. Explain Factors affecting the rate of diffusion.

 

★ WJEC Specification Reference: -Core Concepts: 3. Cell membranes and transport. Overview: Cell membranes are essential in the control of the movement of substances into and out of the cell. They also play a vital role in cell recognition. (c) the following transport mechanisms: diffusion, Facilitated diffusion and factors affecting the rate of diffusion.

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