Final answer:
Transmembrane proteins are integral membrane proteins that span the entire plasma membrane. They are embedded within the lipid bilayer and have hydrophilic regions that interact with the cytosol and extracellular environment. They play important roles in cell signaling, transport of molecules across the membrane, and cell adhesion.
Step-by-step explanation:
Transmembrane proteins are integral membrane proteins that span the entire plasma membrane. These proteins are embedded within the lipid bilayer and have hydrophilic regions that interact with the cytosol and extracellular environment. They play important roles in cell signaling, transport of molecules across the membrane, and cell adhesion.