EVERYDAY SCIENCE

Detailed explanation-1: -Transportation through plasma membrane occurs by simple diffusion, osmosis and facilitated diffusion. These are passive transport mechanisms.

Detailed explanation-2: -Facilitated transport is a type of passive transport. Unlike simple diffusion where materials pass through a membrane without the help of proteins, in facilitated transport, also called facilitated diffusion, materials diffuse across the plasma membrane with the help of membrane proteins.

Detailed explanation-3: -Facilitated diffusion is a type of passive transport. Even though facilitated diffusion involves transport proteins, it is still passive transport because the solute is moving down the concentration gradient. Small nonpolar molecules can easily diffuse across the cell membrane.

Detailed explanation-4: -There are three passive transportation methods-diffusion, facilitated diffusion and osmosis.

Detailed explanation-5: -Carrier proteins. These are proteins that span the plasma membrane (transmembrane proteins) and are also known as permeases. Ion channel proteins. 22-Oct-2018