Ch 5 pt 2 Flashcards
Sodium potassium pump
One type of active transport system
Membrane potential
The voltage difference across a membrane
Electrochemical gradient
Two combined forces, drives the diffusion of ions across a membrane
Electrogenic pump
A transport protein that generates voltage across a membrane
Proton pump
The main electrogenic pump of plants fungi, and bacteria
Contransport
Occurs when active transport of a solute indirectly drives transport of other solutes
Exocytosis
Transport vesicles migrate to membranes, fuse with it, and release their content
Endocytosis
the cell takes in macromolecule by forming vesicles from plasma membranes
Phagocytosis
The cell englulfs a particle in a vacuole
Pinocytosis
Molecules are taken up when extracellular fluid is gulped into tiny vesicles.