Final answer:
Molecules are moved through the body by proteins, particularly through transport proteins like GLUTs that facilitate the passage of glucose into cells.
Step-by-step explanation:
Many molecules are moved through the body by proteins. Specifically, the transport of molecules such as glucose is facilitated by transport proteins in the cell membrane.
These proteins, which include glucose transport proteins or GLUTs, allow substances that cannot easily pass through the lipid bilayer to be transported into cells. Insulin can increase the number of GLUTs on cell surfaces, enhancing glucose uptake from the blood. This mechanism is crucial, especially in the regulation of blood sugar levels and is affected in conditions such as diabetes.
Many molecules are moved through the body by transport proteins. These proteins bind to the molecules and deliver them through the bloodstream to target cells. Examples of transport proteins include glucose transporters that facilitate the movement of glucose into cells.