Summary
Summary OCR A/AS-Level Biology 2.5.2-3 Diffusion Across Membranes
Revision Summary of key knowledge from OCR A/AS-Level Biology 2.5.2-3 Diffusion Across Membranes.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Seller
Follow
Content preview
Diffusion AcrossMembranes
Simple Diffusion
Follows concentration gradient
High to low concentration
Small, lipid-soluble molecules
Integral (not metabolic) energy
Through phospholipid bilayer
Facilitated Diffusion
Follows concentration gradient
High to low concentration
Small, water-soluble molecules
Integral (not metabolic) energy
Through channel proteins
Active Transport
Against concentration gradient
Low to high concentration
Insoluble molecules
Metabolic (not integral) energy
Through carrier proteins
Osmosis
Follows water-potential gradient
High to low water-potential (high to low water concentration)
Low to high solute concentration
Water molecules only
Integral (not metabolic) energy
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller izzylewington04. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83662 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now