4.1 Channels and Transporters Flashcards
1
Q
Channels + Transporters
A
Passive transport:
- simple diffusion
- channel mediated
- carrier mediated
=> electrochemical gradient with no membrane potential
=> electrochemical gradient with membrane potential negative inside
Active transport
=> electrochemical gradient with membrane potential positive inside
2
Q
Channels
A
weak interaction with solutes, no/limited conformational change
3
Q
Transporters
A
bind specific solutes, undergo conformational change
Transport via channels much faster than via transporters
4
Q
Passive Transport
A
Uses an electrochemical gradient or charge
5
Q
Active Transport
A
Requires energy input (can be transport against an
electrochemical gradient or charge)
