Describe the types of movement of substances across a partially permeable membrane

Facilitated diffusion - the movement of substances down a concentration gradient via a membrane protein.
Active transport - the movement of substances against a concentration gradient which requires energy/ATP using a carrier protein.
Osmosis - the movement of water down a water potential gradient.

RT
Answered by Rachael T. Biology tutor

3612 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe the process in which DNA replication occurs (6 marks)


Outline the "Sliding Filament Theory" of muscle contraction.


Why is DNA replication semi-conservative?


Describe and explain how the small intestine is adapted for its function?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning