Which of the following is a form of active transport?

a) carrier protein

b) receptor protein

c) sodium-potassium pump

Active transport requires energy when moving molecules against a concentration agent. It requires for specific membrane transport proteins. Only a certain type of protein can move a certain type of substance.

The three main types of Active Transport are:

1) Sodium-Potassium Pump

2) Endocytosis

3) Exocytosis