The two types of active transport are transport proteins and membrane vesicles. Transport proteins is similar to facilitated diffusion and membrane vesicles is usually called endocytosis. More »

The two basic types of active transport that take place when molecules and other larger materials cross cell membranes are active transport using pumps and active transport using vesicles. Pumps are proteins that push or... More »

Active transport requires energy because it is pumping particles, such as proteins, ions and sugar molecules, against a concentration gradient: from areas of lower to higher solute concentration. The main energy source f... More »

The two basic types of active transport that take place when molecules and other larger materials cross cell membranes are active transport using pumps and active transport using vesicles. Pumps are proteins that push or... More »

Facilitated diffusion differs from simple diffusion in that it crosses a membrane with the aid of passive transport proteins embedded in the membrane. Both types of diffusion are the movement of particles in solution fro... More »

Examples of facilitated diffusion are the passing of K+ ions through a membrane with an aid of a potassium transport protein and the passing of glucose and amino acids with the aid of proteins called permeases. Retinol b... More »

Active transport requires energy because it is pumping particles, such as proteins, ions and sugar molecules, against a concentration gradient: from areas of lower to higher solute concentration. The main energy source f... More »