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

3345 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Putting bee honey on a cut kills bacteria. Honey contains a high concentration of sugar. Use your knowledge of water potential to suggest how putting honey on a cut kills bacteria.


For a dihybrid cross, how do you find out what proportion of offspring are expected to have a certain genotype?


What is ultrafiltration?


Describe the process of primary succession


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:

© 2025 by IXL Learning