In cellular biology, membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes, which are lipid bilayers that contain proteins embedded in them. The regulation of passage through the membrane is due to selective membrane permeability – a characteristic of biological membranes which allows them to separate substances of distinct chemical nature. In other words, they can be permeable to certain substances but not to others.
-Active and co-transport
Secondary active transporter proteins
This video will introduce you about all kinds of transportation techniques via cell membranes. This video clearly explains, make it simple to understand.