passive transport

Q1

What is passive diffusion?

The simplest plasma membrane transport mechanism is called passive diffusion. It is the movement of ions and other molecules within the cells along the concentration gradient, without any external energy.

Q2

What are the three types of membrane transport?

Transportation through plasma membrane occurs by simple diffusion, osmosis and facilitated diffusion. These are passive transport mechanisms.

Q3

What is facilitated diffusion?

In facilitated diffusion, the transport through plasma membrane occurs with the help of specific transmembrane integral proteins. Large and insoluble molecules require a carrier substance for their transportation through the plasma membrane.