This process involves and is divided into two sub-types based on the direction of flow:
While primary and secondary transport deal with ions and small molecules, vesicular transport moves large macromolecules (proteins, polysaccharides) or even whole cells across the membrane. This is also considered active because it requires significant energy (ATP) to deform the cell membrane. active transport types
Motors activate only when the rider is actively pedaling. This process involves and is divided into two
Small, narrow watercraft propelled by double-bladed paddles from a seated position. CliffsNotes Show all Endocytosis: The cell membrane folds
Pumps perform active transport Pumps are membrane proteins that provide active transport of molecules across the membrane. We'll l... CliffsNotes Show all Endocytosis: The cell membrane folds inward to "swallow" external materials, forming a vesicle. Phagocytosis: "Cell eating" (taking in large particles). Pinocytosis: "Cell drinking" (taking in fluids and dissolved solutes). Exocytosis: The reverse process, where internal vesicles fuse with the membrane to release waste or specialized products (like hormones) outside the cell. Summary of Key Differences Type Energy Source Directness Common Example Primary ATP Hydrolysis Direct Sodium-Potassium Pump Secondary Electrochemical Gradient Indirect Sodium-Glucose Symporter Bulk ATP (for vesicle movement) Large Scale Hormone Secretion Would you like to explore how
The cell membrane invaginates (folds inward) to form a pocket, which eventually pinches off to form an internal vesicle.