Primary active transport
ATP consumed directly
ATPase examples
Na/K pump/ATPase - 3 Na out, 2 K in
Ca ATPase
H/K ATPase
Secondary active transport
Cotransport - symport (Na & glucose) or antiport (Na & H)
Often involve Na+, moving downhill
Indirectly uses ATP because of Na/K ATPase
Glucose transport
Facilitated thru GLUT transporter
Secondary active vis SGLT (Na/glucose symport)
Factors impacting simple diffusion
Membrane permeability
Area
Temperature
Viscosity
Radius of molecue
Thickness of membrane
Facilitated diffusion
Uses carrier protein, limited number of bindings sites thus becomes saturated (unlike simple diffusion which is linear)