What are some examples of facilitated diffusion?

Gas transport, glucose and amino acid transfer, and ion transport are some examples of processes which use facilitated diffusion. In glucose and amino acid transport, carrier proteins (glucose transporter or amino acid permeases) are required to move them from the bloodstream into cells since they are large in size. For gas transport, hemoglobin is the carrier protein in the blood, while myoglobin is the carrier protein in muscles. Blood moves through a membrane due to the higher pressure on one side of the membrane and lower pressure on the other side. Ion molecules are transported through proteins called ion channels. These channels are unique to ions such as sodium, calcium, and potassium; ions are able to move rapidly across without utilizing any energy.