LIFE SCIENCE

Detailed explanation-1: -Facilitated diffusion is the diffusion of solutes through transport proteins in the plasma membrane. Channel proteins, gated channel proteins, and carrier proteins are three types of transport proteins that are involved in facilitated diffusion.

Detailed explanation-2: -Examples of biological processes that entail facilitated diffusion are glucose and amino acid transport, gas transport, and ion transport. Facilitated diffusion is important because it regulates what goes in and what goes out of the cell.

Detailed explanation-3: -All channel proteins and many carrier proteins allow solutes to cross the membrane only passively (“downhill”), a process called passive transport, or facilitated diffusion.

Detailed explanation-4: -Both active transport and facilitated diffusion do use proteins to assist in transport. However, active transport works against the concentration gradient, moving substances from areas of low concentration to areas of high concentration.