Membrane Transport Flashcards
What is passive diffusion
Movement of molecules directly through membrane down the conc gradient
What is aqueous diffusion
Movement of molecules down conc gradient via a channel
What is facilitated diffusion
Movement of molecules across membrane via carrier protein
Requires a conc gradient
Why are carrier proteins required in facilitated diffusion
because molecules are charged or polar, they can’t cross the phospholipid part of the membrane without help.
What is the role of aquaporins
Channel proteins that allow movement of water
What is active transport
Movement of molecules against concentration gradient requires energy via ATP hydrolysis
What type of diffusion is non-coupled transport
Passive and aqueous
Which GLUT is responsible for insulin secretion in pancreatic beta cells
GLUT1
What type of transporters are members of the SLC2
GLUT
What type of transport is SGLT1 a example of
Secondary active transport
The Na/K ATPase pump is an example of which type of transport
Primary active transport
In the Na/K ATPase pump ___ Na ions move ____ cell and ____ K ions move ____ cell
3 out
2 in
What is secondary active transport
Movement of ions against concentration gradient requires gradient by coupling
Which ion drives secondary active transport
Na
What does digoxin inhibit
Na/K ATPase pump is an
