EVERYDAY SCIENCE

Detailed explanation-1: -Active transport uses carrier proteins, not channel proteins. These carrier proteins are different than the ones seen in facilitated diffusion, as they need ATP in order to change conformation.

Detailed explanation-2: -Cells also require transport proteins that will actively pump certain solutes across the membrane against their electrochemical gradient (“uphill”); this process, known as active transport, is mediated by carriers, which are also called pumps.

Detailed explanation-3: -While some membrane proteins are not capable of active transport, carrier proteins allow active transport. Molecules bound to the carrier proteins can move uphill, meaning from the area of lower concentration to the area of higher concentration.

Detailed explanation-4: -Carrier proteins are used in both passive and active transport and change shape as they move their particular molecule across the membrane. Examples of carrier proteins within our cells include the sodium potassium pump and glucose transporters.