Final answer:
Plasma membrane proteins that span the membrane are known as integral proteins, and the ones only partially embedded are called peripheral proteins. Integral proteins include transmembrane proteins that cover the entire membrane, while peripheral proteins associate with the membrane surface and can serve various functions.
Step-by-step explanation:
Plasma membrane proteins that span the membrane are called integral proteins, whereas proteins that are only partially embedded, in either the cytoplasmic side or the extracellular side, are called peripheral proteins. The correct answer to the question is: 1) Integral, Peripheral.
Integral proteins are embedded in the plasma membrane and may serve as channels or pumps to move materials into or out of the cell. These include transmembrane proteins that span the entire plasma membrane and integral monotopic proteins that are permanently attached from only one side. On the other hand, peripheral proteins are found on the exterior or interior surfaces of the membrane, attached to integral proteins or to phospholipids, and they may serve as enzymes, structural attachments, or part of cell recognition sites.