Final answer:
Increased temperature does not restrict the movement of membrane proteins, unlike the density of proteins, the membrane skeleton, peripheral proteins, and large extracellular domains.
Step-by-step explanation:
The question refers to the factors that may restrict the movement of membrane proteins within the cellular membrane. Several factors can impede this movement, including the density of proteins embedded in the membrane, which can create a crowded environment; the "membrane skeleton," or the cytoskeletal elements (like actin fibers) that proteins may attach to; peripheral proteins that may bind to membrane surfaces and restrict movement; and large domains that extend into the extracellular space, which can also hinder protein mobility. However, increased temperature typically enhances the mobility of membrane components, including proteins, and does not restrict their movement. Therefore, within the context of the question, increased temperature would be the correct answer as it is the factor that does not restrict the movement of membrane proteins.