Molecules of a substance are able to move between cells. What are the two main processes by which this occurs? What is the main difference between these two processes?

Within cells the two main forms of cellular exchange are diffusion and osmosis. These two terms can sometimes be mixed up as they both mean "the movement of molecules of a substance from an area of higher concentration to an area of lower concentration." The difference between the two processes is that where DIFFUSION is just the movement of molecules of a substance from an area of higher concentration to an area of lower concentration; OSMOSIS is specifically the movement of molecules of WATER through a SELECTIVELY PERMEABLE MEMBRANE from an area of higher water concentration to an area of lower water concentration.

TD
Answered by Tutor34884 D. Biology tutor

2885 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What is the difference between the xylem and phloem?


Explain how a change in one amino acid in an enzyme molecule can stop the enzyme working.


Bob and Brenda are both heterozygous for a genetically inherited recessive trait. (a) Calculate the probability that they would have a healthy child. Use a genetic diagram to help. (b) Suggest an example of a recessive inherited disorder


What is the process by which vaccines protect individuals against infectious diseases?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences