a level - why does an increase or decrease in conc grad not affect active transport?

i understand why concentration gradient is a factor for rate of diffusion and osmosis (as diffusion/osmosis takes place, difference in conc/Water potential on either side of membrance decreases, so rate of diffusion/osmosis levels off over time).
but for A.T, i dont understand why its not affected by this. wouldnt the rate still be affected if ions and molecules move against an increased or decreased conc grad? so if A.T takes place, the difference in conc on either side increases, so wouldnt rate of A.T increase. sorry if this is a stupid question

Reply 1

bramblebee

I think it's because active transport is against the concentration gradient so the concentration isn't affecting the rate and other factors are more important e.g. the presence of carrier proteins (the process can only happen as quickly as these proteins transport substances so concentration gradient has no effect). Idk if that makes sense

Quick Reply

Related discussions

Latest

Trending

Articles for you

Edexcel A-Level Economics Paper 1 - Unofficial Mark Scheme - 18 May 2023

A-level Economics Paper 1 (Edexcel) unofficial markscheme - 15 May 2024

Try out the app

Continue on web