diffusion, facilitated diffusion, imbibition, and osmosis. ii. Active transport: It is a biological process and it runs based on the energy obtained from respiration. It is an uphill process.
. Cell to Cell Transport Cell to cell or short distance transport covers the limited area and consists of few cells. They are the facilitators or tributaries to the long- distance transport. The driving force for the cell to cell transport can be passive or active (Figure .
). The following chart illustrate the various types of cell to cell transport: Figure . : Cell to cell transport Cell to cell transport Passive Transport Active Transport Diffusion Facilitated Diffusion Channel Protein Carrier Protein Channel Protein Carrier Protein Pumps . .
Passive Transport . Diffusion When we expose a lightened incense stick or mosquito coil or open a perfume bottle in a closed room, we can smell the odour everywhere in the room. This is due to the even distribution of perfume molecules throughout the room. This process is called diffusion .
In diffusion , the movement of molecules is continuous and random in order in all directions (Figure . ). Figure . : Distribution of molecules in diffusion (A) Initial stage (B) Final stage Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.
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