Active Transport Flashcards
define active transport
movement of substances against concentration gradient
are channel proteins required?
yes
is energy required?
yes
three types of gradient are
chemical
electrical
pressure
what is the function of carrier proteins?
impart energy to transported substances
types of active transport
primary active transport
secondary active transport
on what basis is active transport differentiated
source of energy
energy source in primary active transport
ATP
source of energy in secondary active transport
ion concentration differences across the membrane
from where are the ion concentration differences arise from?
primary active transport
most common example of primary active transport
Sodium-Potassium Pump
Na-K Pump is also called
Na-K ATPase
why is it called Na-K ATPase?
presence of ATPase enzyme
why is the pump electrogenic?
creates electric potential differences
