L8 Flashcards
1
Q
why do ion gradients exist
A
to maintain cell volume
they give rise to membrane potential
2
Q
what is ion membrane transport influenced by?
A
chemical gradient
membrane potential
3
Q
Why don’t cell volume changes reach theoretical values?
A
- osmotically inactive volume = 15-30% does not respond to osmotic challenge
- cell volume regulatory mechanisms are activated in most cells before full volume change is complete
4
Q
A
