LIFE SCIENCE

Detailed explanation-1: -Facilitated diffusion does not require high energy molecules such as ATP. This type of diffusion uses channel proteins and carrier proteins to transport molecules across the plasma membrane. Facilitated diffusion involves the movement of molecules from areas of higher concentration to areas of lower concentration.

Detailed explanation-2: -Sometimes molecules need the help of special transport proteins to move across the cell membranes. The movement of molecules across a membrane without the input of energy is known as passive transport. When energy (ATP) is needed, the movement is knownAs active transport.

Detailed explanation-3: -Facilitated diffusion is the diffusion of solutes through transport proteins in the plasma membrane. 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.

Detailed explanation-4: -area with lower concentration. The difference between the concentrations is called the “concentration gradient”. Diffusion goes down the gradient until an equilibrium is reached.